USE [dataChange]GO/****** Object: UserDefinedFunction [dbo].[f_splitSTR] Script Date: 05/09/2016 15:04:21 span style=color:#ff0000;自己修改数据库名,直接执行就可以了/span******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOALTER FUNCTION [d
USE [dataChange] GO /****** Object: UserDefinedFunction [dbo].[f_splitSTR] Script Date: 05/09/2016 15:04:21 <span style="color:#ff0000;">自己修改数据库名,直接执行就可以了</span>******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER FUNCTION [dbo].[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(max)) AS BEGIN DECLARE @splitlen int -- 取分隔符的长度, 在分隔符后面加一个字符是为了避免分隔符以空格结束时, 取不到正确的长度 SET @splitlen = LEN(@split + 'a') - 2 -- 如果待分拆的字符串中存在数据分隔符, 则循环取出每个数据项 WHILE CHARINDEX(@split, @s)>0 BEGIN -- 取第一个数据分隔符前的数据项 INSERT @re VALUES(LEFT(@s, CHARINDEX(@split, @s) - 1)) -- 将已经取出的第一个数据项和数据分隔符从待分拆的字符串中去掉 SET @s = STUFF(@s, 1, CHARINDEX(@split, @s) + @splitlen, '') END -- 保存最后一个数据项(最后一个数据项后面没有数据分隔符, 故在前面的循环中不会被处理) INSERT @re VALUES(@s) RETURN end
应用sql:实现数据分割 如数据:
B41J-002/145%B41J-002/15%B41J-003/36%B41J-000/00%B43K-001/00%B41J-002/045%B41J-002/055%B41J-002/21%B43K-008/00%B81B-007/04%B43K-029/00%B43K-027/00%B43K-029/093
取每一组%数据中的前一位组合起来用%分割 得到数据为
B%B%B%B%B%B%B%B%B%B%B%B%B
update [<span style="font-family: Arial, Helvetica, sans-serif;">dataChange</span><span style="font-family: Arial, Helvetica, sans-serif;">].[dbo].[Patent_Info]</span> set IPC_ALL1 = temp.IPC1 from ( select PUB_NO,IPC1 = STUFF( (select '%'+ltrim(IPC1) from (select c.PUB_NO, SUBSTRING(COL,0,2) as IPC1 from( Select B.*,A.IPC_ALL,A.PUB_NO FROM [<span style="font-family: Arial, Helvetica, sans-serif;">dataChange</span><span style="font-family: Arial, Helvetica, sans-serif;">].[dbo].[Patent_Info] A cross apply [</span><span style="font-family: Arial, Helvetica, sans-serif;">dataChange</span><span style="font-family: Arial, Helvetica, sans-serif;">].[dbo].f_splitSTR(IPC_ALL,'%') B</span> )c )tt where PUB_NO= t.PUB_NO for XML path('') ),1,1,'') from (select c.PUB_NO, SUBSTRING(COL,0,2) as IPC1 from( Select B.*,A.IPC_ALL,A.PUB_NO FROM [<span style="font-family: Arial, Helvetica, sans-serif;">dataChange</span><span style="font-family: Arial, Helvetica, sans-serif;">].[dbo].[Patent_Info] A cross apply [</span><span style="font-family: Arial, Helvetica, sans-serif;">dataChange</span><span style="font-family: Arial, Helvetica, sans-serif;">].[dbo].f_splitSTR(IPC_ALL,'%')B)c</span><span style="font-family: Arial, Helvetica, sans-serif;"> </span> )t group by PUB_NO )temp where Patent_Info.PUB_NO = temp.PUB_NO
PUB_NO为数据表唯一字段标识

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