How many employees does each role have? List role description, id and number of employees.
CREATE TABLE ROLES (role_description VARCHAR, role_code VARCHAR); CREATE TABLE Employees (role_code VARCHAR)
[SQL] SELECT T1.role_description, T2.role_code, COUNT(*) FROM ROLES AS T1 JOIN Employees AS T2 ON T1.role_code = T2.role_code GROUP BY T2.role_code [/SQL]