-- 날짜간 비교는 DATEDIFF 잊지 말기! SELECT HISTORY_ID, CAR_ID, DATE_FORMAT(START_DATE, '%Y-%m-%d') AS START_DATE, DATE_FORMAT(END_DATE, '%Y-%m-%d') AS END_DATE, IF (DATEDIFF(END_DATE,START_DATE) >= 30, '장기 대여', '단기 대여') AS RENT_TYPE FROM CAR_RENTAL_COMPANY_RENTAL_HISTORY WHERE START_DATE LIKE '2022-09%' ORDER BY HISTORY_ID DESC