programming-examples/sql/JoinHRDatabase/15. Write a query in SQL to display the name of the department, average salary and number of employees working in that department who got commission.sql

/*15. Write a query in SQL to display the name of the department, average salary and number of employees working in that
 department who got commission.*/
SELECT department_name, AVG(salary), COUNT(commission_pct)   
    FROM departments   
        JOIN employees USING (department_id)   
GROUP BY department_name;