[프로그래머스 LEVEL 4] 그룹별 조건에 맞는 식당 목록 출력하기

https://school.programmers.co.kr/learn/courses/30/lessons/131124

프로그래머스

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문제

MEMBER_PROFILE와 REST_REVIEW 테이블에서 리뷰를 가장 많이 작성한 회원의 리뷰들을 조회하는 SQL문을 작성해주세요. 회원 이름, 리뷰 텍스트, 리뷰 작성일이 출력되도록 작성해주시고, 결과는 리뷰 작성일을 기준으로 오름차순, 리뷰 작성일이 같다면 리뷰 텍스트를 기준으로 오름차순 정렬해주세요.

 

풀이

 

-- 코드를 입력하세요

SELECT m.member_name, r.review_text, date_format(r.review_date, "%Y-%m-%d") as review_date
FROM member_profile m 
JOIN (
    SELECT member_id
    FROM (
        	SELECT member_id, rank() over(order by count(*) desc) as rnk
        	FROM rest_review
        	GROUP BY member_id
            ) as t
    		WHERE rnk = 1 
        ) as sub
    ON m.member_id = sub.member_id
JOIN rest_review r
    ON m.member_id = r.member_id
ORDER BY review_date, review_text;