목록with (2)
Allen's 데이터 맛집
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문제 풀이 -- 2022년 1월 도서 판매 기준으로 저자별, 카테고리별 매출액 조회 SELECT b.author_id, a.AUTHOR_NAME, b.CATEGORY, SUM(b.price * s.sales) AS TOTAL_SALES FROM BOOK b JOIN BOOK_SALES s ON b.BOOK_ID = s.BOOK_ID JOIN AUTHOR a ON b.AUTHOR_ID = a.AUTHOR_ID WHERE DATE_FORMAT(s.SALES_DATE, '%Y-%m') = '2022-01' GROUP BY b.author_id, b.CATEGORY ORDER BY b.author_id, b.CATEGORY DESC; 1.BOOK, BOOK_SALES, AUTHOR 테이블을 조인하여 도서 정보,..
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문제 풀이 -- 리뷰를 가장 많이 작성한 회원 찾기 WITH rm AS ( SELECT member_id, COUNT(member_id) AS count FROM rest_review GROUP BY member_id ORDER BY count DESC LIMIT 1 ) -- 가장 많은 리뷰를 작성한 회원의 리뷰 조회 SELECT m.member_name, r.review_text, DATE_FORMAT(r.review_date, '%Y-%m-%d') AS review_date FROM member_profile AS m JOIN rest_review r ON m.member_id = r.member_id JOIN rm ON r.member_id = rm.member_id ORDER BY review_d..