if exists (select * from dbo.sysobjects where id = object_id(N"[dbo].[f_Sql]") and xtype in (N"FN", N"IF", N"TF")) drop function [dbo].[f_Sql] GO
if exists (select * from dbo.sysobjects where id = object_id(N"[序数表]") and OBJECTPROPERTY(id, N"IsUserTable") = 1) drop table [序数表] GO
--为了效率,所以要一个辅助表配合 select top 1000 id=identity(int,1,1) into 序数表 from syscolumns a,syscolumns b alter table 序数表 add constraint pk_id_序数表 primary key(id) go
/*--根据指定字符串生成查询的模糊匹配字符串
条件连接的关键字为 and,or 可以任意指定括号 生成的条件表达式为 like 模糊匹配
--邹建 2004.08(引用请保留此信息)--*/
/*--调用示例
--调用示例 select A=dbo.f_Sql("(Web or HTML or Internet) and (Programmer or Developer)","content") select B=dbo.f_Sql("Web or HTML or Internet","content") select C=dbo.f_Sql("(Web and HTML)","content") select D=dbo.f_Sql("Web","content") --*/ --示例函数 create function f_Sql( @str Nvarchar(1000), --要检索的字符串 @fdname sysname --在那个字段中检索 )returns Nvarchar(4000) as begin declare @r Nvarchar(4000) set @r="" select @r=@r+case when substring(@str,id,charindex(" ",@str+" ",id)-id) in("or","and") then " "+substring(@str,id,charindex(" ",@str+" ",id)-id)+" " when substring(@str,id,1)="(" then "(["+@fdname+"] like ""%" +substring(@str,id+1,charindex(" ",@str+" ",id)-id-1) +"%""" when substring(@str,charindex(" ",@str+" ",id)-1,1)=")" then "["+@fdname+"] like ""%" +substring(@str,id,charindex(" ",@str+" ",id)-id-1) +"%"")" else "["+@fdname+"] like ""%" +substring(@str,id,charindex(" ",@str+" ",id)-id) +"%""" end from 序数表 where id<=len(@str) and charindex(" "," "+@str,id)-id=0 return(@r) end go