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  • SQL:找到一个关于all some any的用法,可在SSMS里看效果

    SET nocount ON

    USE tempdb
    go

    IF ( OBJECT_ID('t1') IS NOT NULL )
    DROP TABLE t1
    CREATE TABLE t1 ( n INT )
    INSERT INTO t1
    SELECT 2
    UNION
    SELECT 3

    IF ( OBJECT_ID('t2') IS NOT NULL )
    DROP TABLE t2
    CREATE TABLE t2 ( n INT )
    INSERT INTO t2
    SELECT 1
    UNION
    SELECT 2
    UNION
    SELECT 3
    UNION
    SELECT 4

    -- t1表数据 2,3
    -- t2表数据 1,2,3,4
    SELECT *
    FROM t1
    SELECT *
    FROM t2
    -- '>all' 表示:t2表中列n的数据大于t1表中列n的数据的数,结果只有4.
    SELECT *
    FROM t2
    WHERE n > ALL ( SELECT n
    FROM t1 )
    --4
    SELECT *
    FROM t2
    WHERE n > ANY ( SELECT n
    FROM t1 )
    --3,4
    SELECT *
    FROM t2
    WHERE n > SOME ( SELECT n
    FROM t1 )
    --3,4

    SELECT *
    FROM t2
    WHERE n = ALL ( SELECT n
    FROM t1 )
    --无数据
    SELECT *
    FROM t2
    WHERE n = ANY ( SELECT n
    FROM t1 )
    --2,3
    SELECT *
    FROM t2
    WHERE n = SOME ( SELECT n
    FROM t1 )
    --2,3

    SELECT *
    FROM t2
    WHERE n < ALL ( SELECT n
    FROM t1 )
    --1
    SELECT *
    FROM t2
    WHERE n < ANY ( SELECT n
    FROM t1 )
    --1,2
    SELECT *
    FROM t2
    WHERE n < SOME ( SELECT n
    FROM t1 )
    --1,2

    SELECT *
    FROM t2
    WHERE n <>ALL ( SELECT n
    FROM t1 )
    --1,4
    SELECT *
    FROM t2
    WHERE n <>ANY ( SELECT n
    FROM t1 )
    --1,2,3,4
    SELECT *
    FROM t2
    WHERE n <>SOME ( SELECT n
    FROM t1 )
    --1,2,3,4
    SET nocount OFF

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  • 原文地址:https://www.cnblogs.com/i124q29/p/3832729.html
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