sql删除字符串中重复字符-mysql教程

20051218125830_5988312367.vox
20051218125850_5988312367.vox
20051218135407_5932733345.vox
20051218175857_5923922228.vox
20051218180045_5923922228.vox

过滤后剩下的记录为：
20051218125830_5988312367.vox
20051218135407_5932733345.vox
20051218175857_5923922228.vox

---去除字符串中重?偷闹岛??br /> create function StringRemove(@str nvarchar(2000))
returns varchar(2000)
as
begin
declare @result nvarchar(2000),@temp nvarchar(1000)
set @result=''
set @temp=''
while(charindex(',',@str)<>0)
begin
set @temp=substring(@str,1,charindex(',',@str))
if(charindex(@temp,@result)<=0)
set @result=@result+@temp
set @str=stuff(@str,1,charindex(',',@str),'')
end
return @result
end
GO
--('?T聚文','?T','?T聚文','1','23','1')

--?y?
select dbo.StringRemove('?T聚文,?T,?T聚文,1,23,1')