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  • 全表行转列——动态SQL

    具体代码实现如下(点击代码展开):

    代码
    --title:全表行转列——动态SQL
    --
    author:【DBA】小七
    --
    create date:2009-11-21
    use master
    create table tb(id char(2) ,AA CHAR(10),BB char(10),CC CHAR(10))
    INSERT INTO tb
    SELECT '1','ASGAHDF','ccc','HSNS' union all
    select '2','sdfsa','dd','SBSH' UNION ALL
    select '3','sSGDH','DCD','JRTJK' UNION ALL
    select '4','fJKDH','OP9V','T48JI' UNION ALL
    select '5','sJDNR','NTY','T161I' UNION ALL
    select '6','DNDH','HSDR','XDYURI' UNION ALL
    select '7','DNJKDH','DHN','TSDJ' UNION ALL
    select '8','sJngKH','HBNRV','TYMRT9I' UNION ALL
    select '9','Krm5DH','SHE','D9NKUI' UNION ALL
    select '10','DH46m','SJN5R','J0OKUI'
    SELECT * FROM tb

    go
    declare @sql1 varchar(8000),@sql2 varchar(8000),@sql3 varchar(8000),@sql4 varchar(8000)


    set @sql1='select ''AA'' id '
    set @sql2='select ''BB'' id'
    set @sql3='select ''CC'' id'
    set @sql4=''
    select @sql1 = @sql1 +', (case id when id then '''+AA+''' end) ['+ id+' ]' from (select distinct * from tb) as a
    set @sql1=@sql1+' from tb '
    select @sql2 = @sql2 +', (case id when id then '''+BB+''' end) ['+ id+' ]' from (select distinct * from tb) as b
    set @sql2=@sql2+' from tb '
    select @sql3 = @sql3 +', (case id when id then '''+CC+''' end) ['+ id+' ]' from (select distinct * from tb) as a
    set @sql3=@sql3+' from tb '
    set @sql1= 'select distinct * from ('+@sql1+') as a '
    set @sql2= 'select distinct * from ('+@sql2+') as b'
    set @sql3= 'select distinct * from ('+@sql3+') as c'
    set @sql4 = @sql1+' union all '+@sql2+' union all '+@sql3
    exec(@sql4)

    go
    drop table tb


    (所影响的行数为
    10 行)

    id AA BB CC
    ---- ---------- ---------- ----------
    1 ASGAHDF ccc HSNS
    2 sdfsa dd SBSH
    3 sSGDH DCD JRTJK
    4 fJKDH OP9V T48JI
    5 sJDNR NTY T161I
    6 DNDH HSDR XDYURI
    7 DNJKDH DHN TSDJ
    8 sJngKH HBNRV TYMRT9I
    9 Krm5DH SHE D9NKUI
    10 DH46m SJN5R J0OKUI

    (所影响的行数为
    10 行)

    id
    1 10 2 3 4 5 6 7 8 9
    ---- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
    AA ASGAHDF DH46m sdfsa sSGDH fJKDH sJDNR DNDH DNJKDH sJngKH Krm5DH
    BB ccc SJN5R dd DCD OP9V NTY HSDR DHN HBNRV SHE
    CC HSNS J0OKUI SBSH JRTJK T48JI T161I XDYURI TSDJ TYMRT9I D9NKUI

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  • 原文地址:https://www.cnblogs.com/dba_xiaoqi/p/1852569.html
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