Sql Server字符串拆分(Split)方法汇总

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--方法0：动态SQL法
declare @s varchar(100),@sql varchar(1000)
set @s='1,2,3,4,5,6,7,8,9,10'
set @sql='select col='''+ replace(@s,',',''' union all select ''')+''''
PRINT @sql
exec (@sql)--方法1：循环截取法
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[f_splitSTR]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[f_splitSTR]
GOCREATE FUNCTION f_splitSTR(
@s   varchar(8000),   --待分拆的字符串
@split varchar(10)     --数据分隔符
)RETURNS @re TABLE(col varchar(100))
AS
BEGINDECLARE @splitlen intSET @splitlen=LEN(@split+'a')-2WHILE CHARINDEX(@split,@s)>0BEGININSERT @re VALUES(LEFT(@s,CHARINDEX(@split,@s)-1))SET @s=STUFF(@s,1,CHARINDEX(@split,@s)+@splitlen,'')ENDINSERT @re VALUES(@s)RETURN
END
GO--方法2：使用临时性分拆辅助表法
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[f_splitSTR]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[f_splitSTR]
GOCREATE FUNCTION f_splitSTR(
@s   varchar(8000),  --待分拆的字符串
@split varchar(10)     --数据分隔符
)RETURNS @re TABLE(col varchar(100))
AS
BEGIN--创建分拆处理的辅助表(用户定义函数中只能操作表变量)DECLARE @t TABLE(ID int IDENTITY,b bit)INSERT @t(b) SELECT TOP 8000 0 FROM syscolumns a,syscolumns bINSERT @re SELECT SUBSTRING(@s,ID,CHARINDEX(@split,@s+@split,ID)-ID)FROM @tWHERE ID<=LEN(@s+'a') AND CHARINDEX(@split,@split+@s,ID)=IDRETURN
END
GO--方法3：使用永久性分拆辅助表法
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[f_splitSTR]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[f_splitSTR]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[tb_splitSTR]') and objectproperty(id,N'IsUserTable')=1)
drop table [dbo].[tb_splitSTR]
GO--字符串分拆辅助表
SELECT TOP 8000 ID=IDENTITY(int,1,1) INTO dbo.tb_splitSTR
FROM syscolumns a,syscolumns b
GO
--字符串分拆处理函数
CREATE FUNCTION f_splitSTR(
@s     varchar(8000),  --待分拆的字符串
@split  varchar(10)     --数据分隔符
)RETURNS TABLE
AS
RETURN(SELECT col=CAST(SUBSTRING(@s,ID,CHARINDEX(@split,@s+@split,ID)-ID) as varchar(100))FROM tb_splitSTRWHERE ID<=LEN(@s+'a') AND CHARINDEX(@split,@split+@s,ID)=ID)
GO--方法4：循环字符串分割
create FUNCTION [dbo].[Fun_SplitStr]
(@originalStr      VARCHAR(8000), --要分割的字符串@split varchar(100)  --分隔符号
)
RETURNS @temp TABLE(Result VARCHAR(100))
AS
BEGINDECLARE @result AS VARCHAR(100);   --定义变量用于接收单个结果 SET @originalStr = @originalStr + @split ;  WHILE (@originalStr <> '')BEGINSET @result = LEFT(@originalStr, CHARINDEX(@split, @originalStr, 1) -1) ;  INSERT @temp VALUES(@result) ;  --STUFF()函数用于删除指定长度的字符，并可以在指定的起点处插入另一组字符。SET @originalStr = STUFF(@originalStr, 1, CHARINDEX(@split, @originalStr, 1), '');END RETURNEND--方法5：利用sql server2005的OUTER APPLYCREATE FUNCTION [dbo].[ufn_SplitStringToTable]
(@str VARCHAR(MAX) ,@split VARCHAR(10)
)
RETURNS TABLEAS 
RETURN( SELECT    B.idFROM      ( SELECT    [value] = CONVERT(XML , '<v>' + REPLACE(@str , @split , '</v><v>')+ '</v>')) AOUTER APPLY ( SELECT  id = N.v.value('.' , 'varchar(100)')FROM    A.[value].nodes('/v') N ( v )) B)

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