SELECT department_ID, count(employee_id) as '# of Employees' FROM EMPLOYEES
WHERE DEPARTMENT_ID IN
(
SELECT DEPARTMENT_ID
FROM EMPLOYEES
GROUP BY DEPARTMENT_ID
HAVING COUNT(*)>5
)
AND HIRE_DATE NOT LIKE '%JAN%'
group by department_ID;
Esta consulta devuelve el id_departamento y como agrupo por id_departamento, se devolverá el recuento de empleados que pertenecen a cada departamento
La salida se verá así
Department_Id | # of Employees
1 7
2 6
4 9