sql server判断是否重复值

create function RepeatString(@input varchar(8000),@separator varchar(10))
returns  int
as
 begin    
    declare @temp table(part varchar(100)) 
	 declare @i int ,@result int
	 set @input=rtrim(ltrim(@input))    
	 set @i=charindex(@separator,@input)    
	 while @i>=1    
	 begin        
			 insert @temp values(left(@input,@i-1))        
			 set @input=substring(@input,@i+1,len(@input)-@i)        
			 set @i=charindex(@separator,@input)    
	 end    
	 if exists(select part,count(*) from @temp group by part having count(*)>1)
	   set @result=1 --存在重复
	   else 
	   set @result=0 --不存在重复
	   return   @result
end
go

--测试

select  dbo.RepeatString('1,1,2,3,1',',')  --1
select  dbo.RepeatString('1,2,3,4,5',',')  --0

sql server判断是否重复值

原文：http://blog.csdn.net/xiaoyong_net/article/details/46924541