SELECT last_name, (monthly_salary * 12) + (monthly_salary * 12 * monthly_commission_pct) AS annual_comp FROM employees;
SELECT last_name, (monthly_salary + monthly_commission_pct) * 12 AS annual_comp FROM employees;
SELECT last_name, (monthly_salary * 12) + (monthly_commission_pct * 12) AS annual_comp FROM employees;
SELECT last_name, (monthly_salary * 12) + (monthly_salary * 12 * NVL (monthly_commission_pct, 0)) AS annual_comp FROM employees;