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NESPED - Generative AI Reaserch 4

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

How many heads of the departments are older than 56 ?

easy

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT count(*) FROM head WHERE age > 56

{ 'head': ['head_id', 'age'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'head': ['head_ID', 'age'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

List the name, born state and age of the heads of departments ordered by age.

medium

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT name , born_state , age FROM head ORDER BY age

{ 'head': ['head_id', 'name', 'born_state', 'age'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'head': ['head_ID', 'name', 'born_state', 'age'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

List the creation year, name and budget of each department.

medium

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT creation , name , budget_in_billions FROM department

{ 'department': ['department_id', 'name', 'creation', 'budget_in_billions'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'department': ['Department_ID', 'Name', 'Creation', 'Budget_in_Billions'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

What are the maximum and minimum budget of the departments?

medium

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT max(budget_in_billions) , min(budget_in_billions) FROM department

{ 'department': ['department_id', 'budget_in_billions'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'department': ['Department_ID', 'Budget_in_Billions'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

What is the average number of employees of the departments whose rank is between 10 and 15?

easy

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT avg(num_employees) FROM department WHERE ranking BETWEEN 10 AND 15

{ 'department': ['department_id', 'ranking', 'num_employees'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'department': ['Department_ID', 'Ranking', 'Num_Employees'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

What are the names of the heads who are born outside the California state?

easy

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT name FROM head WHERE born_state != 'California'

{ 'head': ['head_id', 'name', 'born_state'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'head': ['head_ID', 'name', 'born_state'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

What are the distinct creation years of the departments managed by a secretary born in state 'Alabama'?

hard

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT DISTINCT department.creation FROM department JOIN management ON department.department_id = management.department_id JOIN head ON management.head_id = head.head_id WHERE head.born_state = 'Alabama'

{ 'department': ['department_id', 'creation'], 'management': ['department_id', 'head_id'], 'head': ['head_id', 'born_state'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'department': ['Department_ID', 'Creation'], 'management': ['department_ID', 'head_ID'], 'head': ['head_ID', 'born_state'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

What are the names of the states where at least 3 heads were born?

easy

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT born_state FROM head GROUP BY born_state HAVING count(*) >= 3

{ 'head': ['head_id', 'born_state'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'head': ['head_ID', 'born_state'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

In which year were most departments established?

hard

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT creation FROM department GROUP BY creation ORDER BY count(*) DESC LIMIT 1

{ 'department': ['department_id', 'creation'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'department': ['Department_ID', 'Creation'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

Show the name and number of employees for the departments managed by heads whose temporary acting value is 'Yes'?

medium

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT department.name , department.num_employees FROM department JOIN management ON department.department_id = management.department_id WHERE management.temporary_acting = 'Yes'

{ 'department': ['department_id', 'name', 'num_employees'], 'management': ['department_id', 'temporary_acting'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'department': ['Department_ID', 'Name', 'Num_Employees'], 'management': ['department_ID', 'temporary_acting'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

How many acting statuses are there?

easy

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT count(DISTINCT temporary_acting) FROM management

{ 'management': ['department_id', 'temporary_acting'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'management': ['department_ID', 'temporary_acting'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

How many departments are led by heads who are not mentioned?

extra

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT count(*) FROM department WHERE department_id NOT IN (SELECT department_id FROM management);

{ 'department': ['department_id'], 'management': ['department_id'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'department': ['Department_ID'], 'management': ['department_ID'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

What are the distinct ages of the heads who are acting?

medium

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT DISTINCT head.age FROM management JOIN head ON head.head_id = management.head_id WHERE management.temporary_acting = 'Yes'

{ 'management': ['department_id', 'head_id', 'temporary_acting'], 'head': ['head_id', 'age'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'management': ['department_ID', 'head_ID', 'temporary_acting'], 'head': ['head_ID', 'age'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

List the states where both the secretary of 'Treasury' department and the secretary of 'Homeland Security' were born.

extra

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT head.born_state FROM department JOIN management ON department.department_id = management.department_id JOIN head ON management.head_id = head.head_id WHERE department.name = 'Treasury' INTERSECT SELECT head.born_state FROM department JOIN management ON department.department_id = management.department_id JOIN head ON management.head_id = head.head_id WHERE department.name = 'Homeland Security'

{ 'department': ['department_id', 'name'], 'management': ['department_id', 'head_id'], 'head': ['head_id', 'born_state'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'department': ['Department_ID', 'Name'], 'management': ['department_ID', 'head_ID'], 'head': ['head_ID', 'born_state'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

Which department has more than 1 head at a time? List the id, name and the number of heads.

medium

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT department.department_id , department.name , count(*) FROM management JOIN department ON department.department_id = management.department_id GROUP BY department.department_id HAVING count(*) > 1

{ 'management': ['department_id'], 'department': ['department_id', 'name'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'management': ['department_ID'], 'department': ['Department_ID', 'Name'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

department_management

CREATE TABLE department ( "Department_ID" INTEGER, "Name" TEXT, "Creation" TEXT, "Ranking" INTEGER, "Budget_in_Billions" REAL, "Num_Employees" REAL, PRIMARY KEY ("Department_ID") ) CREATE TABLE head ( "head_ID" INTEGER, name TEXT, born_state TEXT, age REAL, PRIMARY KEY ("head_ID") ) CREATE TABLE management ( "department_ID" INTEGER, "head_ID" INTEGER, temporary_acting TEXT, PRIMARY KEY ("department_ID", "head_ID"), FOREIGN KEY("head_ID") REFERENCES head ("head_ID"), FOREIGN KEY("department_ID") REFERENCES department ("Department_ID") )

Which head's name has the substring 'Ha'? List the id and name.

medium

Table department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) Table head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

SELECT head_id , name FROM head WHERE name LIKE '%Ha%'

{ 'head': ['head_id', 'name'] }

CREATE TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) CREATE TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

Table department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) Table head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) Table management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

CREATE TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) CREATE TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) CREATE TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

{ 'department': ['Department_ID', 'Name', 'Creation', 'Ranking', 'Budget_in_Billions', 'Num_Employees'], 'head': ['head_ID', 'name', 'born_state', 'age'], 'management': ['department_ID', 'head_ID', 'temporary_acting'] }

{ 'head': ['head_ID', 'name'] }

TABLE department ( department.Department_ID (INT), department.Name (TEXT), department.Creation (TEXT), department.Ranking (INT), department.Budget_in_Billions (REAL), department.Num_Employees (REAL), ) TABLE head ( head.head_ID (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_ID (INT), management.head_ID (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_ID = department.Department_ID management.head_ID = head.head_ID

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

TABLE department ( department.department_id (INT), department.name (TEXT), department.creation (TEXT), department.ranking (INT), department.budget_in_billions (REAL), department.num_employees (REAL), ) TABLE head ( head.head_id (INT), head.name (TEXT), head.born_state (TEXT), head.age (REAL), ) TABLE management ( management.department_id (INT), management.head_id (INT), management.temporary_acting (TEXT), ) Possible JOINs: management.department_id = department.department_id management.head_id = head.head_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

How many farms are there?

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT count(*) FROM farm

{ 'farm': ['farm_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm': ['Farm_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Count the number of farms.

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT count(*) FROM farm

{ 'farm': ['farm_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm': ['Farm_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

List the total number of horses on farms in ascending order.

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Total_Horses FROM farm ORDER BY Total_Horses ASC

{ 'farm': ['farm_id', 'total_horses'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm': ['Farm_ID', 'Total_Horses'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What is the total horses record for each farm, sorted ascending?

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Total_Horses FROM farm ORDER BY Total_Horses ASC

{ 'farm': ['farm_id', 'total_horses'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm': ['Farm_ID', 'Total_Horses'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the hosts of competitions whose theme is not "Aliens"?

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Hosts FROM farm_competition WHERE Theme != 'Aliens'

{ 'farm_competition': ['competition_id', 'theme', 'hosts'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm_competition': ['Competition_ID', 'Theme', 'Hosts'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Return the hosts of competitions for which the theme is not Aliens?

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Hosts FROM farm_competition WHERE Theme != 'Aliens'

{ 'farm_competition': ['competition_id', 'theme', 'hosts'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm_competition': ['Competition_ID', 'Theme', 'Hosts'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the themes of farm competitions sorted by year in ascending order?

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Theme FROM farm_competition ORDER BY YEAR ASC

{ 'farm_competition': ['competition_id', 'year', 'theme'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm_competition': ['Competition_ID', 'Year', 'Theme'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Return the themes of farm competitions, sorted by year ascending.

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Theme FROM farm_competition ORDER BY YEAR ASC

{ 'farm_competition': ['competition_id', 'year', 'theme'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm_competition': ['Competition_ID', 'Year', 'Theme'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What is the average number of working horses of farms with more than 5000 total number of horses?

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT avg(Working_Horses) FROM farm WHERE Total_Horses > 5000

{ 'farm': ['farm_id', 'total_horses', 'working_horses'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm': ['Farm_ID', 'Total_Horses', 'Working_Horses'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Give the average number of working horses on farms with more than 5000 total horses.

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT avg(Working_Horses) FROM farm WHERE Total_Horses > 5000

{ 'farm': ['farm_id', 'total_horses', 'working_horses'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm': ['Farm_ID', 'Total_Horses', 'Working_Horses'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the maximum and minimum number of cows across all farms.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT max(Cows) , min(Cows) FROM farm

{ 'farm': ['farm_id', 'cows'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm': ['Farm_ID', 'Cows'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Return the maximum and minimum number of cows across all farms.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT max(Cows) , min(Cows) FROM farm

{ 'farm': ['farm_id', 'cows'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'farm': ['Farm_ID', 'Cows'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

How many different statuses do cities have?

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT count(DISTINCT Status) FROM city

{ 'city': ['city_id', 'status'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Count the number of different statuses.

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT count(DISTINCT Status) FROM city

{ 'city': ['city_id', 'status'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

List official names of cities in descending order of population.

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Official_Name FROM city ORDER BY Population DESC

{ 'city': ['city_id', 'official_name', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the official names of cities, ordered descending by population?

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Official_Name FROM city ORDER BY Population DESC

{ 'city': ['city_id', 'official_name', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

List the official name and status of the city with the largest population.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Official_Name , Status FROM city ORDER BY Population DESC LIMIT 1

{ 'city': ['city_id', 'official_name', 'status', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What is the official name and status of the city with the most residents?

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Official_Name , Status FROM city ORDER BY Population DESC LIMIT 1

{ 'city': ['city_id', 'official_name', 'status', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Show the years and the official names of the host cities of competitions.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT farm_competition.Year , city.Official_Name FROM city JOIN farm_competition ON city.City_ID = farm_competition.Host_city_ID

{ 'city': ['city_id', 'official_name'], 'farm_competition': ['competition_id', 'year', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name'], 'farm_competition': ['Competition_ID', 'Year', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Give the years and official names of the cities of each competition.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT farm_competition.Year , city.Official_Name FROM city JOIN farm_competition ON city.City_ID = farm_competition.Host_city_ID

{ 'city': ['city_id', 'official_name'], 'farm_competition': ['competition_id', 'year', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name'], 'farm_competition': ['Competition_ID', 'Year', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Show the official names of the cities that have hosted more than one competition.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT city.Official_Name FROM city JOIN farm_competition ON city.City_ID = farm_competition.Host_city_ID GROUP BY farm_competition.Host_city_ID HAVING COUNT(*) > 1

{ 'city': ['city_id', 'official_name'], 'farm_competition': ['competition_id', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name'], 'farm_competition': ['Competition_ID', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the official names of cities that have hosted more than one competition?

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT city.Official_Name FROM city JOIN farm_competition ON city.City_ID = farm_competition.Host_city_ID GROUP BY farm_competition.Host_city_ID HAVING COUNT(*) > 1

{ 'city': ['city_id', 'official_name'], 'farm_competition': ['competition_id', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name'], 'farm_competition': ['Competition_ID', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Show the status of the city that has hosted the greatest number of competitions.

extra

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT city.Status FROM city JOIN farm_competition ON city.City_ID = farm_competition.Host_city_ID GROUP BY farm_competition.Host_city_ID ORDER BY COUNT(*) DESC LIMIT 1

{ 'city': ['city_id', 'status'], 'farm_competition': ['competition_id', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status'], 'farm_competition': ['Competition_ID', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What is the status of the city that has hosted the most competitions?

extra

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT city.Status FROM city JOIN farm_competition ON city.City_ID = farm_competition.Host_city_ID GROUP BY farm_competition.Host_city_ID ORDER BY COUNT(*) DESC LIMIT 1

{ 'city': ['city_id', 'status'], 'farm_competition': ['competition_id', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status'], 'farm_competition': ['Competition_ID', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Please show the themes of competitions with host cities having populations larger than 1000.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT farm_competition.Theme FROM city JOIN farm_competition ON city.City_ID = farm_competition.Host_city_ID WHERE city.Population > 1000

{ 'city': ['city_id', 'population'], 'farm_competition': ['competition_id', 'theme', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Population'], 'farm_competition': ['Competition_ID', 'Theme', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the themes of competitions that have corresponding host cities with more than 1000 residents?

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT farm_competition.Theme FROM city JOIN farm_competition ON city.City_ID = farm_competition.Host_city_ID WHERE city.Population > 1000

{ 'city': ['city_id', 'population'], 'farm_competition': ['competition_id', 'theme', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Population'], 'farm_competition': ['Competition_ID', 'Theme', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Please show the different statuses of cities and the average population of cities with each status.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Status , avg(Population) FROM city GROUP BY Status

{ 'city': ['city_id', 'status', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the statuses and average populations of each city?

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Status , avg(Population) FROM city GROUP BY Status

{ 'city': ['city_id', 'status', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Please show the different statuses, ordered by the number of cities that have each.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Status FROM city GROUP BY Status ORDER BY COUNT(*) ASC

{ 'city': ['city_id', 'status'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Return the different statuses of cities, ascending by frequency.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Status FROM city GROUP BY Status ORDER BY COUNT(*) ASC

{ 'city': ['city_id', 'status'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

List the most common type of Status across cities.

hard

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Status FROM city GROUP BY Status ORDER BY COUNT(*) DESC LIMIT 1

{ 'city': ['city_id', 'status'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What is the most common status across all cities?

hard

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Status FROM city GROUP BY Status ORDER BY COUNT(*) DESC LIMIT 1

{ 'city': ['city_id', 'status'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

List the official names of cities that have not held any competition.

hard

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Official_Name FROM city WHERE City_ID NOT IN (SELECT Host_city_ID FROM farm_competition)

{ 'city': ['city_id', 'official_name'], 'farm_competition': ['competition_id', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name'], 'farm_competition': ['Competition_ID', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the official names of cities that have not hosted a farm competition?

hard

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Official_Name FROM city WHERE City_ID NOT IN (SELECT Host_city_ID FROM farm_competition)

{ 'city': ['city_id', 'official_name'], 'farm_competition': ['competition_id', 'host_city_id'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name'], 'farm_competition': ['Competition_ID', 'Host_city_ID'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Show the status shared by cities with population bigger than 1500 and smaller than 500.

hard

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Status FROM city WHERE Population > 1500 INTERSECT SELECT Status FROM city WHERE Population < 500

{ 'city': ['city_id', 'status', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Which statuses correspond to both cities that have a population over 1500 and cities that have a population lower than 500?

hard

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Status FROM city WHERE Population > 1500 INTERSECT SELECT Status FROM city WHERE Population < 500

{ 'city': ['city_id', 'status', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Find the official names of cities with population bigger than 1500 or smaller than 500.

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Official_Name FROM city WHERE Population > 1500 OR Population < 500

{ 'city': ['city_id', 'official_name', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the official names of cities that have population over 1500 or less than 500?

medium

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Official_Name FROM city WHERE Population > 1500 OR Population < 500

{ 'city': ['city_id', 'official_name', 'population'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Official_Name', 'Population'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

Show the census ranking of cities whose status are not "Village".

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Census_Ranking FROM city WHERE Status != "Village"

{ 'city': ['city_id', 'status', 'census_ranking'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status', 'Census_Ranking'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

farm

CREATE TABLE city ( "City_ID" INTEGER, "Official_Name" TEXT, "Status" TEXT, "Area_km_2" REAL, "Population" REAL, "Census_Ranking" TEXT, PRIMARY KEY ("City_ID") ) CREATE TABLE competition_record ( "Competition_ID" INTEGER, "Farm_ID" INTEGER, "Rank" INTEGER, PRIMARY KEY ("Competition_ID", "Farm_ID"), FOREIGN KEY("Farm_ID") REFERENCES farm ("Farm_ID"), FOREIGN KEY("Competition_ID") REFERENCES farm_competition ("Competition_ID") ) CREATE TABLE farm ( "Farm_ID" INTEGER, "Year" INTEGER, "Total_Horses" REAL, "Working_Horses" REAL, "Total_Cattle" REAL, "Oxen" REAL, "Bulls" REAL, "Cows" REAL, "Pigs" REAL, "Sheep_and_Goats" REAL, PRIMARY KEY ("Farm_ID") ) CREATE TABLE farm_competition ( "Competition_ID" INTEGER, "Year" INTEGER, "Theme" TEXT, "Host_city_ID" INTEGER, "Hosts" TEXT, PRIMARY KEY ("Competition_ID"), FOREIGN KEY("Host_city_ID") REFERENCES city ("City_ID") )

What are the census rankings of cities that do not have the status "Village"?

easy

Table city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) Table competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) Table farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) Table farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

SELECT Census_Ranking FROM city WHERE Status != "Village"

{ 'city': ['city_id', 'status', 'census_ranking'] }

CREATE TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) CREATE TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

Table city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) Table competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) Table farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) Table farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

CREATE TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) CREATE TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) CREATE TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) CREATE TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

{ 'city': ['City_ID', 'Official_Name', 'Status', 'Area_km_2', 'Population', 'Census_Ranking'], 'farm': ['Farm_ID', 'Year', 'Total_Horses', 'Working_Horses', 'Total_Cattle', 'Oxen', 'Bulls', 'Cows', 'Pigs', 'Sheep_and_Goats'], 'farm_competition': ['Competition_ID', 'Year', 'Theme', 'Host_city_ID', 'Hosts'], 'competition_record': ['Competition_ID', 'Farm_ID', 'Rank'] }

{ 'city': ['City_ID', 'Status', 'Census_Ranking'] }

TABLE city ( city.City_ID (INT), city.Official_Name (TEXT), city.Status (TEXT), city.Area_km_2 (REAL), city.Population (REAL), city.Census_Ranking (TEXT), ) TABLE competition_record ( competition_record.Competition_ID (INT), competition_record.Farm_ID (INT), competition_record.Rank (INT), ) TABLE farm ( farm.Farm_ID (INT), farm.Year (INT), farm.Total_Horses (REAL), farm.Working_Horses (REAL), farm.Total_Cattle (REAL), farm.Oxen (REAL), farm.Bulls (REAL), farm.Cows (REAL), farm.Pigs (REAL), farm.Sheep_and_Goats (REAL), ) TABLE farm_competition ( farm_competition.Competition_ID (INT), farm_competition.Year (INT), farm_competition.Theme (TEXT), farm_competition.Host_city_ID (INT), farm_competition.Hosts (TEXT), ) Possible JOINs: competition_record.Competition_ID = farm_competition.Competition_ID competition_record.Farm_ID = farm.Farm_ID farm_competition.Host_city_ID = city.City_ID

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

TABLE city ( city.city_id (INT), city.official_name (TEXT), city.status (TEXT), city.area_km_2 (REAL), city.population (REAL), city.census_ranking (TEXT), ) TABLE competition_record ( competition_record.competition_id (INT), competition_record.farm_id (INT), competition_record.rank (INT), ) TABLE farm ( farm.farm_id (INT), farm.year (INT), farm.total_horses (REAL), farm.working_horses (REAL), farm.total_cattle (REAL), farm.oxen (REAL), farm.bulls (REAL), farm.cows (REAL), farm.pigs (REAL), farm.sheep_and_goats (REAL), ) TABLE farm_competition ( farm_competition.competition_id (INT), farm_competition.year (INT), farm_competition.theme (TEXT), farm_competition.host_city_id (INT), farm_competition.hosts (TEXT), ) Possible JOINs: competition_record.competition_id = farm_competition.competition_id competition_record.farm_id = farm.farm_id farm_competition.host_city_id = city.city_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

which course has most number of registered students?

extra

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT courses.course_name FROM courses JOIN student_course_registrations ON courses.course_id = student_course_registrations.course_Id GROUP BY courses.course_id ORDER BY count(*) DESC LIMIT 1

{ 'courses': ['course_id', 'course_name'], 'student_course_registrations': ['student_id', 'course_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Courses': ['course_id', 'course_name'], 'Student_Course_Registrations': ['student_id', 'course_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What is the name of the course with the most registered students?

extra

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT courses.course_name FROM courses JOIN student_course_registrations ON courses.course_id = student_course_registrations.course_Id GROUP BY courses.course_id ORDER BY count(*) DESC LIMIT 1

{ 'courses': ['course_id', 'course_name'], 'student_course_registrations': ['student_id', 'course_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Courses': ['course_id', 'course_name'], 'Student_Course_Registrations': ['student_id', 'course_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

what is id of students who registered some courses but the least number of courses in these students?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_registrations GROUP BY student_id ORDER BY count(*) LIMIT 1

{ 'student_course_registrations': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Registrations': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the ids of the students who registered for some courses but had the least number of courses for all students?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_registrations GROUP BY student_id ORDER BY count(*) LIMIT 1

{ 'student_course_registrations': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Registrations': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

what are the first name and last name of all candidates?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT people.first_name , people.last_name FROM candidates JOIN people ON candidates.candidate_id = people.person_id

{ 'candidates': ['candidate_id'], 'people': ['person_id', 'first_name', 'last_name'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Candidates': ['candidate_id'], 'People': ['person_id', 'first_name', 'last_name'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the first and last names of all the candidates?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT people.first_name , people.last_name FROM candidates JOIN people ON candidates.candidate_id = people.person_id

{ 'candidates': ['candidate_id'], 'people': ['person_id', 'first_name', 'last_name'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Candidates': ['candidate_id'], 'People': ['person_id', 'first_name', 'last_name'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

List the id of students who never attends courses?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM students WHERE student_id NOT IN (SELECT student_id FROM student_course_attendance)

{ 'students': ['student_id'], 'student_course_attendance': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Students': ['student_id'], 'Student_Course_Attendance': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the ids of every student who has never attended a course?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM students WHERE student_id NOT IN (SELECT student_id FROM student_course_attendance)

{ 'students': ['student_id'], 'student_course_attendance': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Students': ['student_id'], 'Student_Course_Attendance': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

List the id of students who attended some courses?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_attendance

{ 'student_course_attendance': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Attendance': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the ids of all students who have attended at least one course?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_attendance

{ 'student_course_attendance': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Attendance': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the ids of all students for courses and what are the names of those courses?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_course_registrations.student_id , courses.course_name FROM student_course_registrations JOIN courses ON student_course_registrations.course_id = courses.course_id

{ 'student_course_registrations': ['student_id', 'course_id'], 'courses': ['course_id', 'course_name'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Registrations': ['student_id', 'course_id'], 'Courses': ['course_id', 'course_name'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What is detail of the student who most recently registered course?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT students.student_details FROM student_course_registrations JOIN students ON student_course_registrations.student_id = students.student_id ORDER BY student_course_registrations.registration_date DESC LIMIT 1

{ 'student_course_registrations': ['student_id', 'registration_date'], 'students': ['student_id', 'student_details'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Registrations': ['student_id', 'registration_date'], 'Students': ['student_id', 'student_details'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What details do we have on the students who registered for courses most recently?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT students.student_details FROM student_course_registrations JOIN students ON student_course_registrations.student_id = students.student_id ORDER BY student_course_registrations.registration_date DESC LIMIT 1

{ 'student_course_registrations': ['student_id', 'registration_date'], 'students': ['student_id', 'student_details'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Registrations': ['student_id', 'registration_date'], 'Students': ['student_id', 'student_details'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

How many students attend course English?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT count(*) FROM courses JOIN student_course_attendance ON courses.course_id = student_course_attendance.course_id WHERE courses.course_name = "English"

{ 'courses': ['course_id', 'course_name'], 'student_course_attendance': ['student_id', 'course_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Courses': ['course_id', 'course_name'], 'Student_Course_Attendance': ['student_id', 'course_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

How many students are attending English courses?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT count(*) FROM courses JOIN student_course_attendance ON courses.course_id = student_course_attendance.course_id WHERE courses.course_name = "English"

{ 'courses': ['course_id', 'course_name'], 'student_course_attendance': ['student_id', 'course_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Courses': ['course_id', 'course_name'], 'Student_Course_Attendance': ['student_id', 'course_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

How many courses do the student whose id is 171 attend?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT count(*) FROM courses JOIN student_course_attendance ON courses.course_id = student_course_attendance.course_id WHERE student_course_attendance.student_id = 171

{ 'courses': ['course_id'], 'student_course_attendance': ['student_id', 'course_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Courses': ['course_id'], 'Student_Course_Attendance': ['student_id', 'course_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

How many courses does the student with id 171 actually attend?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT count(*) FROM courses JOIN student_course_attendance ON courses.course_id = student_course_attendance.course_id WHERE student_course_attendance.student_id = 171

{ 'courses': ['course_id'], 'student_course_attendance': ['student_id', 'course_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Courses': ['course_id'], 'Student_Course_Attendance': ['student_id', 'course_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

Find id of the candidate whose email is [email protected]?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT candidates.candidate_id FROM people JOIN candidates ON people.person_id = candidates.candidate_id WHERE people.email_address = "[email protected]"

{ 'people': ['person_id', 'email_address'], 'candidates': ['candidate_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'People': ['person_id', 'email_address'], 'Candidates': ['candidate_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What is the id of the candidate whose email is [email protected]?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT candidates.candidate_id FROM people JOIN candidates ON people.person_id = candidates.candidate_id WHERE people.email_address = "[email protected]"

{ 'people': ['person_id', 'email_address'], 'candidates': ['candidate_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'People': ['person_id', 'email_address'], 'Candidates': ['candidate_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

Find id of the candidate who most recently accessed the course?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT candidate_id FROM candidate_assessments ORDER BY assessment_date DESC LIMIT 1

{ 'candidate_assessments': ['candidate_id', 'assessment_date'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Candidate_Assessments': ['candidate_id', 'assessment_date'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What is the id of the candidate who most recently accessed the course?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT candidate_id FROM candidate_assessments ORDER BY assessment_date DESC LIMIT 1

{ 'candidate_assessments': ['candidate_id', 'assessment_date'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Candidate_Assessments': ['candidate_id', 'assessment_date'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What is detail of the student who registered the most number of courses?

extra

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT students.student_details FROM students JOIN student_course_registrations ON students.student_id = student_course_registrations.student_id GROUP BY students.student_id ORDER BY count(*) DESC LIMIT 1

{ 'students': ['student_id', 'student_details'], 'student_course_registrations': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Students': ['student_id', 'student_details'], 'Student_Course_Registrations': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the details of the student who registered for the most number of courses?

extra

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT students.student_details FROM students JOIN student_course_registrations ON students.student_id = student_course_registrations.student_id GROUP BY students.student_id ORDER BY count(*) DESC LIMIT 1

{ 'students': ['student_id', 'student_details'], 'student_course_registrations': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Students': ['student_id', 'student_details'], 'Student_Course_Registrations': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

List the id of students who registered some courses and the number of their registered courses?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT students.student_id , count(*) FROM students JOIN student_course_registrations ON students.student_id = student_course_registrations.student_id GROUP BY students.student_id

{ 'students': ['student_id'], 'student_course_registrations': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Students': ['student_id'], 'Student_Course_Registrations': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

For every student who is registered for some course, how many courses are they registered for?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT students.student_id , count(*) FROM students JOIN student_course_registrations ON students.student_id = student_course_registrations.student_id GROUP BY students.student_id

{ 'students': ['student_id'], 'student_course_registrations': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Students': ['student_id'], 'Student_Course_Registrations': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

How many registed students do each course have? List course name and the number of their registered students?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT courses.course_name , count(*) FROM students JOIN student_course_registrations ON students.student_id = student_course_registrations.student_id JOIN courses ON student_course_registrations.course_id = courses.course_id GROUP BY student_course_registrations.course_id

{ 'students': ['student_id'], 'student_course_registrations': ['student_id', 'course_id'], 'courses': ['course_id', 'course_name'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Students': ['student_id'], 'Student_Course_Registrations': ['student_id', 'course_id'], 'Courses': ['course_id', 'course_name'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

For each course id, how many students are registered and what are the course names?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT courses.course_name , count(*) FROM students JOIN student_course_registrations ON students.student_id = student_course_registrations.student_id JOIN courses ON student_course_registrations.course_id = courses.course_id GROUP BY student_course_registrations.course_id

{ 'students': ['student_id'], 'student_course_registrations': ['student_id', 'course_id'], 'courses': ['course_id', 'course_name'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Students': ['student_id'], 'Student_Course_Registrations': ['student_id', 'course_id'], 'Courses': ['course_id', 'course_name'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

Find id of candidates whose assessment code is "Pass"?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT candidate_id FROM candidate_assessments WHERE asessment_outcome_code = "Pass"

{ 'candidate_assessments': ['candidate_id', 'asessment_outcome_code'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Candidate_Assessments': ['candidate_id', 'asessment_outcome_code'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the ids of the candidates that have an outcome code of Pass?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT candidate_id FROM candidate_assessments WHERE asessment_outcome_code = "Pass"

{ 'candidate_assessments': ['candidate_id', 'asessment_outcome_code'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Candidate_Assessments': ['candidate_id', 'asessment_outcome_code'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

Find the cell mobile number of the candidates whose assessment code is "Fail"?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT people.cell_mobile_number FROM candidates JOIN candidate_assessments ON candidates.candidate_id = candidate_assessments.candidate_id JOIN people ON candidates.candidate_id = people.person_id WHERE candidate_assessments.asessment_outcome_code = "Fail"

{ 'candidates': ['candidate_id'], 'candidate_assessments': ['candidate_id', 'asessment_outcome_code'], 'people': ['person_id', 'cell_mobile_number'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Candidates': ['candidate_id'], 'Candidate_Assessments': ['candidate_id', 'asessment_outcome_code'], 'People': ['person_id', 'cell_mobile_number'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the cell phone numbers of the candidates that received an assessment code of "Fail"?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT people.cell_mobile_number FROM candidates JOIN candidate_assessments ON candidates.candidate_id = candidate_assessments.candidate_id JOIN people ON candidates.candidate_id = people.person_id WHERE candidate_assessments.asessment_outcome_code = "Fail"

{ 'candidates': ['candidate_id'], 'candidate_assessments': ['candidate_id', 'asessment_outcome_code'], 'people': ['person_id', 'cell_mobile_number'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Candidates': ['candidate_id'], 'Candidate_Assessments': ['candidate_id', 'asessment_outcome_code'], 'People': ['person_id', 'cell_mobile_number'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the id of students who registered course 301?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_attendance WHERE course_id = 301

{ 'student_course_attendance': ['student_id', 'course_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Attendance': ['student_id', 'course_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the ids of the students who registered for course 301?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_attendance WHERE course_id = 301

{ 'student_course_attendance': ['student_id', 'course_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Attendance': ['student_id', 'course_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What is the id of the student who most recently registered course 301?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_attendance WHERE course_id = 301 ORDER BY date_of_attendance DESC LIMIT 1

{ 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the ids of the students who registered for course 301 most recently?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_attendance WHERE course_id = 301 ORDER BY date_of_attendance DESC LIMIT 1

{ 'student_course_attendance': ['student_id', 'course_id', 'date_of_attendance'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

Find distinct cities of addresses of people?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT DISTINCT addresses.city FROM addresses JOIN people_addresses ON addresses.address_id = people_addresses.address_id

{ 'addresses': ['address_id', 'city'], 'people_addresses': ['person_address_id', 'address_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Addresses': ['address_id', 'city'], 'People_Addresses': ['person_address_id', 'address_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the different cities where people live?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT DISTINCT addresses.city FROM addresses JOIN people_addresses ON addresses.address_id = people_addresses.address_id

{ 'addresses': ['address_id', 'city'], 'people_addresses': ['person_address_id', 'address_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Addresses': ['address_id', 'city'], 'People_Addresses': ['person_address_id', 'address_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

Find distinct cities of address of students?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT DISTINCT addresses.city FROM addresses JOIN people_addresses ON addresses.address_id = people_addresses.address_id JOIN students ON people_addresses.person_id = students.student_id

{ 'addresses': ['address_id', 'city'], 'people_addresses': ['person_address_id', 'person_id', 'address_id'], 'students': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Addresses': ['address_id', 'city'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id'], 'Students': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the different cities where students live?

medium

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT DISTINCT addresses.city FROM addresses JOIN people_addresses ON addresses.address_id = people_addresses.address_id JOIN students ON people_addresses.person_id = students.student_id

{ 'addresses': ['address_id', 'city'], 'people_addresses': ['person_address_id', 'person_id', 'address_id'], 'students': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Addresses': ['address_id', 'city'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id'], 'Students': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

List the names of courses in alphabetical order?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT course_name FROM courses ORDER BY course_name

{ 'courses': ['course_id', 'course_name'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Courses': ['course_id', 'course_name'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the names of the courses in alphabetical order?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT course_name FROM courses ORDER BY course_name

{ 'courses': ['course_id', 'course_name'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Courses': ['course_id', 'course_name'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

List the first names of people in alphabetical order?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT first_name FROM people ORDER BY first_name

{ 'people': ['person_id', 'first_name'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'People': ['person_id', 'first_name'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the first names of the people in alphabetical order?

easy

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT first_name FROM people ORDER BY first_name

{ 'people': ['person_id', 'first_name'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'People': ['person_id', 'first_name'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

student_assessment

CREATE TABLE "Addresses" ( address_id INTEGER NOT NULL, line_1 VARCHAR(80), line_2 VARCHAR(80), city VARCHAR(50), zip_postcode CHAR(20), state_province_county VARCHAR(50), country VARCHAR(50), PRIMARY KEY (address_id) ) CREATE TABLE "Candidate_Assessments" ( candidate_id INTEGER NOT NULL, qualification CHAR(15) NOT NULL, assessment_date DATETIME NOT NULL, asessment_outcome_code CHAR(15) NOT NULL, PRIMARY KEY (candidate_id, qualification), FOREIGN KEY(candidate_id) REFERENCES "Candidates" (candidate_id) ) CREATE TABLE "Candidates" ( candidate_id INTEGER NOT NULL, candidate_details VARCHAR(255), PRIMARY KEY (candidate_id), FOREIGN KEY(candidate_id) REFERENCES "People" (person_id) ) CREATE TABLE "Courses" ( course_id VARCHAR(100) NOT NULL, course_name VARCHAR(120), course_description VARCHAR(255), other_details VARCHAR(255), PRIMARY KEY (course_id) ) CREATE TABLE "People" ( person_id INTEGER NOT NULL, first_name VARCHAR(255), middle_name VARCHAR(255), last_name VARCHAR(255), cell_mobile_number VARCHAR(40), email_address VARCHAR(40), login_name VARCHAR(40), password VARCHAR(40), PRIMARY KEY (person_id) ) CREATE TABLE "People_Addresses" ( person_address_id INTEGER NOT NULL, person_id INTEGER NOT NULL, address_id INTEGER NOT NULL, date_from DATETIME, date_to DATETIME, PRIMARY KEY (person_address_id), FOREIGN KEY(person_id) REFERENCES "People" (person_id), FOREIGN KEY(address_id) REFERENCES "Addresses" (address_id) ) CREATE TABLE "Student_Course_Attendance" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, date_of_attendance DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id, course_id) REFERENCES "Student_Course_Registrations" (student_id, course_id) ) CREATE TABLE "Student_Course_Registrations" ( student_id INTEGER NOT NULL, course_id INTEGER NOT NULL, registration_date DATETIME NOT NULL, PRIMARY KEY (student_id, course_id), FOREIGN KEY(student_id) REFERENCES "Students" (student_id), FOREIGN KEY(course_id) REFERENCES "Courses" (course_id) ) CREATE TABLE "Students" ( student_id INTEGER NOT NULL, student_details VARCHAR(255), PRIMARY KEY (student_id), FOREIGN KEY(student_id) REFERENCES "People" (person_id) )

What are the id of students who registered courses or attended courses?

hard

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

SELECT student_id FROM student_course_registrations UNION SELECT student_id FROM student_course_attendance

{ 'student_course_registrations': ['student_id'], 'student_course_attendance': ['student_id'] }

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) Table Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) Table Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) Table Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) Table People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) Table People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) Table Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) Table Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) Table Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

CREATE TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) CREATE TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) CREATE TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) CREATE TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) CREATE TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) CREATE TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) CREATE TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

Table addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) Table candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) Table candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) Table courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) Table people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) Table people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) Table student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) Table student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) Table students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

CREATE TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) CREATE TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) CREATE TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) CREATE TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) CREATE TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) CREATE TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) CREATE TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) CREATE TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) CREATE TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id

{ 'Addresses': ['address_id', 'line_1', 'line_2', 'city', 'zip_postcode', 'state_province_county', 'country'], 'People': ['person_id', 'first_name', 'middle_name', 'last_name', 'cell_mobile_number', 'email_address', 'login_name', 'password'], 'Students': ['student_id', 'student_details'], 'Courses': ['course_id', 'course_name', 'course_description', 'other_details'], 'People_Addresses': ['person_address_id', 'person_id', 'address_id', 'date_from', 'date_to'], 'Student_Course_Registrations': ['student_id', 'course_id', 'registration_date'], 'Student_Course_Attendance': ['student_id', 'course_id', 'date_of_attendance'], 'Candidates': ['candidate_id', 'candidate_details'], 'Candidate_Assessments': ['candidate_id', 'qualification', 'assessment_date', 'asessment_outcome_code'] }

{ 'Student_Course_Registrations': ['student_id'], 'Student_Course_Attendance': ['student_id'] }

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE Addresses ( Addresses.address_id (INTEGER), Addresses.line_1 (VARCHAR(80)), Addresses.line_2 (VARCHAR(80)), Addresses.city (VARCHAR(50)), Addresses.zip_postcode (CHAR(20)), Addresses.state_province_county (VARCHAR(50)), Addresses.country (VARCHAR(50)), ) TABLE Candidate_Assessments ( Candidate_Assessments.candidate_id (INTEGER), Candidate_Assessments.qualification (CHAR(15)), Candidate_Assessments.assessment_date (DATETIME), Candidate_Assessments.asessment_outcome_code (CHAR(15)), ) TABLE Candidates ( Candidates.candidate_id (INTEGER), Candidates.candidate_details (VARCHAR(255)), ) TABLE Courses ( Courses.course_id (VARCHAR(100)), Courses.course_name (VARCHAR(120)), Courses.course_description (VARCHAR(255)), Courses.other_details (VARCHAR(255)), ) TABLE People ( People.person_id (INTEGER), People.first_name (VARCHAR(255)), People.middle_name (VARCHAR(255)), People.last_name (VARCHAR(255)), People.cell_mobile_number (VARCHAR(40)), People.email_address (VARCHAR(40)), People.login_name (VARCHAR(40)), People.password (VARCHAR(40)), ) TABLE People_Addresses ( People_Addresses.person_address_id (INTEGER), People_Addresses.person_id (INTEGER), People_Addresses.address_id (INTEGER), People_Addresses.date_from (DATETIME), People_Addresses.date_to (DATETIME), ) TABLE Student_Course_Attendance ( Student_Course_Attendance.student_id (INTEGER), Student_Course_Attendance.course_id (INTEGER), Student_Course_Attendance.date_of_attendance (DATETIME), ) TABLE Student_Course_Registrations ( Student_Course_Registrations.student_id (INTEGER), Student_Course_Registrations.course_id (INTEGER), Student_Course_Registrations.registration_date (DATETIME), ) TABLE Students ( Students.student_id (INTEGER), Students.student_details (VARCHAR(255)), ) Possible JOINs: Candidate_Assessments.candidate_id = Candidates.candidate_id Candidates.candidate_id = People.person_id People_Addresses.person_id = People.person_id People_Addresses.address_id = Addresses.address_id Student_Course_Attendance.student_id = Student_Course_Registrations.student_id Student_Course_Attendance.course_id = Student_Course_Registrations.course_id Student_Course_Registrations.student_id = Students.student_id Student_Course_Registrations.course_id = Courses.course_id Students.student_id = People.person_id

TABLE addresses ( addresses.address_id (INTEGER), addresses.line_1 (VARCHAR(80)), addresses.line_2 (VARCHAR(80)), addresses.city (VARCHAR(50)), addresses.zip_postcode (CHAR(20)), addresses.state_province_county (VARCHAR(50)), addresses.country (VARCHAR(50)), ) TABLE candidate_assessments ( candidate_assessments.candidate_id (INTEGER), candidate_assessments.qualification (CHAR(15)), candidate_assessments.assessment_date (DATETIME), candidate_assessments.asessment_outcome_code (CHAR(15)), ) TABLE candidates ( candidates.candidate_id (INTEGER), candidates.candidate_details (VARCHAR(255)), ) TABLE courses ( courses.course_id (VARCHAR(100)), courses.course_name (VARCHAR(120)), courses.course_description (VARCHAR(255)), courses.other_details (VARCHAR(255)), ) TABLE people ( people.person_id (INTEGER), people.first_name (VARCHAR(255)), people.middle_name (VARCHAR(255)), people.last_name (VARCHAR(255)), people.cell_mobile_number (VARCHAR(40)), people.email_address (VARCHAR(40)), people.login_name (VARCHAR(40)), people.password (VARCHAR(40)), ) TABLE people_addresses ( people_addresses.person_address_id (INTEGER), people_addresses.person_id (INTEGER), people_addresses.address_id (INTEGER), people_addresses.date_from (DATETIME), people_addresses.date_to (DATETIME), ) TABLE student_course_attendance ( student_course_attendance.student_id (INTEGER), student_course_attendance.course_id (INTEGER), student_course_attendance.date_of_attendance (DATETIME), ) TABLE student_course_registrations ( student_course_registrations.student_id (INTEGER), student_course_registrations.course_id (INTEGER), student_course_registrations.registration_date (DATETIME), ) TABLE students ( students.student_id (INTEGER), students.student_details (VARCHAR(255)), ) Possible JOINs: candidate_assessments.candidate_id = candidates.candidate_id candidates.candidate_id = people.person_id people_addresses.person_id = people.person_id people_addresses.address_id = addresses.address_id student_course_attendance.student_id = student_course_registrations.student_id student_course_attendance.course_id = student_course_registrations.course_id student_course_registrations.student_id = students.student_id student_course_registrations.course_id = courses.course_id students.student_id = people.person_id