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  • SQL SERVER PIVOT使用

    参照这个网址介绍

    http://www.cnblogs.com/lwhkdash/archive/2012/06/26/2562979.html

    一般SQL Server的函数都会识别为紫色,可是PIVOT却是灰色,我一开始以为是SQL Server不能使用,但能正常使用

    可以使用print @@version确认下兼容级别,90的是没问题的

    Microsoft SQL Server 2005 - 9.00.4060.00 (X64)

    数据库右键->属性->选项

    这聚合函数对text,nvarchar,varchar字段都不适用,只有将INCOME是DECIMAL才可以

    create table WEEK_INCOME3(WEEK NVARCHAR(10),INCOME text)


     

     既然需要1个函数,那对于varchar类型还可以用max函数作变通的办法,text就还是不行

    create table WEEK_INCOME4(WEEK NVARCHAR(10),INCOME VARCHAR(10))

    delete from WEEK_INCOME4

    INSERT INTO WEEK_INCOME4
    SELECT 'D1', '$1000'
    UNION ALL
    SELECT'D2', '$2000'
    UNION ALL
    SELECT'D3', '$3000'
    UNION ALL
    SELECT'D4', '$4000'
    UNION ALL
    SELECT'D5', '$5000'
    UNION ALL
    SELECT'D6', '$6000'
    UNION ALL
    SELECT'D7', '$7000'




    由PIVOT函数的格式可以看出,WEEK column的值作为变化后的列名,不是字符串的形式,若是column值有空格,则需要用中括号。


    update WEEK_INCOME4 set WEEK ='D1 D1' where iNCOME='$1000'
     
    select * from WEEK_INCOME4
    pivot(max(INCOME) for [WEEK] in ([D1 D1],D2,D3,D4,D5,D6,D7)) tbl

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  • 原文地址:https://www.cnblogs.com/sui84/p/6777196.html
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