sqlserver字串拆分(split)方法匯總

標籤：

--方法0：動態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 @sqlexec (@sql)

--方法1：迴圈截取法

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),   --待分拆的字串@split varchar(10)     --資料分隔字元)RETURNS @re TABLE(col varchar(100))ASBEGIN DECLARE @splitlen int SET @splitlen=LEN(@split+‘a‘)-2 WHILE CHARINDEX(@split,@s)>0 BEGIN  INSERT @re VALUES(LEFT(@s,CHARINDEX(@split,@s)-1))  SET @s=STUFF(@s,1,CHARINDEX(@split,@s)+@splitlen,‘‘) END INSERT @re VALUES(@s) RETURNENDGO

 --方法2：使用臨時性分拆輔助表法

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),  --待分拆的字串@split varchar(10)     --資料分隔字元)RETURNS @re TABLE(col varchar(100))ASBEGIN --建立分拆處理的輔助表(使用者定義函數中只能動作表變數) DECLARE @t TABLE(ID int IDENTITY,b bit) INSERT @t(b) SELECT TOP 8000 0 FROM syscolumns a,syscolumns b INSERT @re SELECT SUBSTRING(@s,ID,CHARINDEX(@split,@s+@split,ID)-ID) FROM @t WHERE ID<=LEN(@s+‘a‘)   AND CHARINDEX(@split,@split+@s,ID)=ID RETURNENDGO 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]GOif 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

 --方法3：使用永久性分拆輔助表法

--字串分拆輔助表SELECT TOP 8000 ID=IDENTITY(int,1,1) INTO dbo.tb_splitSTRFROM syscolumns a,syscolumns bGO--字串分拆處理函數CREATE FUNCTION f_splitSTR(@s     varchar(8000),  --待分拆的字串@split  varchar(10)     --資料分隔字元)RETURNS TABLEASRETURN( SELECT col=CAST(SUBSTRING(@s,ID,CHARINDEX(@split,@s+@split,ID)-ID) as varchar(100)) FROM tb_splitSTR WHERE ID<=LEN(@s+‘a‘)   AND CHARINDEX(@split,@split+@s,ID)=ID)GO

 --方法4：利用sql server2005的OUTER APPLY

CREATE FUNCTION [dbo].[ufn_SplitStringToTable](  @str VARCHAR(MAX) ,  @split VARCHAR(10))RETURNS TABLE    AS RETURN    ( SELECT    B.id      FROM      ( SELECT    [value] = CONVERT(XML , ‘<v>‘ + REPLACE(@str , @split , ‘</v><v>‘)                            + ‘</v>‘)                ) A      OUTER APPLY ( SELECT  id = N.v.value(‘.‘ , ‘varchar(100)‘)                    FROM    A.[value].nodes(‘/v‘) N ( v )                  ) B    )

備忘說明：

方法4必須在sql server2005下才可以運行

 

轉：aierong原創技術隨筆  sqlserver字串拆分(split)方法匯總

sqlserver字串拆分(split)方法匯總