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由于业务需求,我们可能会把一串以分割符字符串数据放到一个字段,如我们在客户端处理拆分是很简单的,不过这样做效果不太好,怎么用SQL SERVER 2008 来解决这件事件哪?
--参考 拆分表: --> --> (Roy)生成測試數據 if not object_id( ' Tab ') is null drop table Tab Go Create table Tab([Col1] int,[COl2] nvarchar( 5)) Insert Tab select 1,N ' a,b,c ' union all select 2,N ' d,e ' union all select 3,N ' f ' Go SQL2000用辅助表: if object_id( ' Tempdb..#Num ') is not null drop table #Num go select top 100 ID=Identity( int, 1, 1) into #Num from syscolumns a,syscolumns b Select a.Col1,COl2=substring(a.Col2,b.ID,charindex( ' , ',a.Col2+ ' , ',b.ID)-b.ID) from Tab a,#Num b where charindex( ' , ', ' , '+a.Col2,b.ID)=b.ID --也可用 substring( ' , '+a.COl2,b.ID, 1)= ' , ' SQL2005用Xml: select a.COl1,b.Col2 from ( select Col1,COl2=convert(xml, ' <root> <v> '+replace(COl2, ' , ', ' </v> <v> ')+ ' </v> </root> ') from Tab)a outer apply ( select Col2=C.v.value( ' . ', ' nvarchar(100) ') from a.COl2.nodes( ' /root/v ')C(v))b SQL05用CTE: ;with roy as ( select Col1,COl2=cast(left(Col2,charindex( ' , ',Col2+ ' , ')- 1) as nvarchar( 100)),Split=cast(stuff(COl2+ ' , ', 1,charindex( ' , ',Col2+ ' , '), '') as nvarchar( 100)) from Tab union all select Col1,COl2=cast(left(Split,charindex( ' , ',Split)- 1) as nvarchar( 100)),Split= cast(stuff(Split, 1,charindex( ' , ',Split), '') as nvarchar( 100)) from Roy where split> '' ) select COl1,COl2 from roy order by COl1 option (MAXRECURSION 0) 生成结果: /* Col1 COl2 ----------- ----- 1 a 1 b 1 c 2 d 2 e 3 f */