https://school.programmers.co.kr/learn/courses/30/lessons/157341
코드설명
DISTINCT + INNER JOIN + DATE_FORMAT 를 활용합니다.
코드
-- 코드를 입력하세요
SELECT DISTINCT(CRCC.CAR_ID) AS CAR_ID
FROM CAR_RENTAL_COMPANY_CAR AS CRCC
INNER JOIN CAR_RENTAL_COMPANY_RENTAL_HISTORY AS CRCRH
ON CRCC.CAR_ID = CRCRH.CAR_ID
WHERE DATE_FORMAT(CRCRH.START_DATE, '%m') = '10' AND CRCC.CAR_TYPE = '세단'
ORDER BY CAR_ID DESC
ORACLE
-- 코드를 입력하세요
SELECT DISTINCT(CRCC.CAR_ID) AS CAR_ID
FROM CAR_RENTAL_COMPANY_CAR CRCC
INNER JOIN CAR_RENTAL_COMPANY_RENTAL_HISTORY CRCRH
ON CRCC.CAR_ID = CRCRH.CAR_ID AND REGEXP_LIKE(CRCC.CAR_TYPE, '(세단)') AND TO_CHAR(CRCRH.START_DATE, 'MM') = '10'
ORDER BY CAR_ID DESC;