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  • sql求分组数据中最小的前三条

    --方法1.求分组数据中最小的前三条
    SELECT  t1.*
    FROM    dbo.info t1
    WHERE   t1.name IN ( SELECT TOP 3
                                t2.name
                         FROM   info t2
                         WHERE  t2.class = t1.class
                         ORDER BY t2.score ASC )
                         ORDER BY t1.class DESC ,t1.score asc
    --方法2.求分组数据中最小的前三条
    SELECT * FROM
    (SELECT  * ,
            ( SELECT    COUNT(1)
              FROM      dbo.info t2
              WHERE     t1.score > t2.score
                        AND t1.class = t2.class 
            ) AS num
    FROM    dbo.info t1) t
                WHERE num<=2
                ORDER BY t.class DESC,num ASC               

    以下是表结构

    方法1查询后的结果

    方法2查询的结果

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  • 原文地址:https://www.cnblogs.com/huang361964533/p/sql.html
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