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목록상위N개 (1)
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내 세상
[MySQL] 그룹 지어서 상위 N개 추출하는 쿼리
SELECT TestA as ta, TestB as tb, TestC, TestD, RANK_NUM FROM (SELECT *, (CASE @groupColumn WHEN column1 THEN @rowNum:=@rowNum+1 ELSE @rowNum:=1 END) AS RANK_NUM, (@groupColumn:=column1) FROM noname_table ORDER BY column1, column2 desc ) AS rankTable WHERE RANK_NUM
Technical/MySQL
2021. 10. 29. 18:27