-- ============================================= -- Author: <over> -- Create date: <2007/09/19> -- Description: <string.split()拆分字符串> -- ============================================= ALTER FUNCTION [ dbo ] . [ Split ] ( @string varchar ( 255 ), -- 1,2,3,45, @separator char = ' , ' ) RETURNS @temp TABLE ( Item int ) AS BEGIN DECLARE @Item int DECLARE @CurrentIndex int DECLARE @NextIndex int DECLARE @Length int -- 字符串的长度 SET @CurrentIndex = 1 SET @Length = DATALENGTH ( @string ) IF @string IS NOT NULL BEGIN WHILE @CurrentIndex < @Length BEGIN -- CHARINDEX(子串,被搜索的字符串) SET @NextIndex = CHARINDEX ( @separator , @string , @CurrentIndex ) SET @Item = SUBSTRING ( @string , @CurrentIndex , @NextIndex - @CurrentIndex ) SET @CurrentIndex = @NextIndex + 1 -- 把临时变量的值放到要返回的表中 INSERT INTO @temp VALUES ( @Item ) END END RETURN END 调用代码:
-- ============================================= -- Author: <over> -- Create date: <2007/09/19> -- Description: <更新用户的角色(更改授权)> -- ============================================= ALTER PROCEDURE dbo.UpdUserRole @UserID INT , -- 这里没有做UserID的检查 @RoleIDs VARCHAR ( 255 ) -- 1,2,3,4,5 AS SET NOCOUNT ON -- 单个权限值 DECLARE @RoleID INT -- 获得拆分之后的字符串 DECLARE Roles CURSOR FOR SELECT Item FROM [ dbo ] . [ Split ] ( @RoleIDs , default ) -- for Read Only -- 删除原有权限 DELETE FROM UserRoles WHERE UserID = @UserID OPEN Roles FETCH Roles INTO @RoleID WHILE ( @@FETCH_STATUS = 0 ) BEGIN -- SELECT UserID FROM UserRoles WHERE UserID=@UserID AND RoleID=@RoleID -- if @@rowcount=0 INSERT INTO UserRoles VALUES ( @UserID , @RoleID ) -- 把下一个值塞给变量@RoleID FETCH NEXT FROM Roles INTO @RoleID END CLOSE Roles -- DEALLOCATE 用于删除前面准备好的查询。 -- 如果你没有明确 DEALLOCATE 一个准备好的查询, 那么它在会话结束的时候删除。 DEALLOCATE Roles -- RETURN 注意:
此函数在SQLSERVER2005存储过程中调用没有问题,如果需要移植到SQLSERVER2000下,只需把:
换成 @separator char ( 1 ) = ' , ' 可参考曾发过的一篇文章。
本文转自博客园农民伯伯的博客,原文链接:,如需转载请自行联系原博主。