SE doreste afisarea numarul de angajati din fiecare departament. Care din urmatoarele interogari este / sunt corecte?
A. Select department_id, count(*)
from employees
B. SELECT department_id, count(employee_id)
FROM employees
Group by department_id;
C. Select department_id, count(*)
From employees
Group by department_id;
D. SELECT department_id,employee_id,count(employee)id)
From employees
Group By department_id;
Wähle eine oder mehr der folgenden: