ADD_MONTHS
MONTHS_BETWEEN
LAST_DAY
2つの日付間の月数を返します。
MONTHS_BETWEEN(d1, d2)
下記の値を入力するとサンプルに即時反映されます。
employee_id
hire_date
months_served
employees
-- 근속 개월 수 SELECT employee_id, FLOOR(MONTHS_BETWEEN(SYSDATE, hire_date)) AS months_served FROM employees;