프로그래머스: 조건에 부합하는 중고거래 댓글 조회하기 - MySQL

문제 출처 

https://school.programmers.co.kr/learn/courses/30/lessons/164673

프로그래머스

 

정답 코드 

SELECT A.TITLE, A.BOARD_ID, B.REPLY_ID,B.WRITER_ID, B.CONTENTS, DATE_FORMAT(B.CREATED_DATE, '%Y-%m-%d') AS CREATED_DATE
FROM USED_GOODS_BOARD AS A
JOIN USED_GOODS_REPLY AS B 
ON A.BOARD_ID = B.BOARD_ID  
WHERE DATE_FORMAT(A.CREATED_DATE, '%Y-%m') = '2022-10'
ORDER BY B.CREATED_DATE ASC, A.TITLE ASC