SQL分割与去重

-----------创建实现split功能 的函数------------ create function f_split(@SourceSql varchar(8000),@StrSeprate varchar(10)) returns @temp table(a varchar(100)) as begin     declare @i int     set @SourceSql=rtrim(ltrim(@SourceSql))     set @i=charindex(@StrSeprate,@SourceSql)     while @i>=1     begin         insert @temp values(left(@SourceSql,@i-1))         set @SourceSql=substring(@SourceSql,@i+1,len(@SourceSql)-@i)         set @i=charindex(@StrSeprate,@SourceSql)     end     if @SourceSql<>''        insert @temp values(@SourceSql)     return end GO

-----------创建实现split并去重功能 的函数------------ create function SplitAndDistinct(@SourceStr varchar(500),@StrSeprate varchar(10))     returns varchar(500) AS begin declare @pos int declare @ret varchar(20) declare @table table(ret varchar(20)) declare @SplitAndDistinctStr varchar(500) select @SourceStr = @SourceStr + @StrSeprate select @pos = charindex(@StrSeprate,@SourceStr) while @pos > 0 begin     select @ret = substring(@SourceStr,1,@pos-1)     insert into @table select @ret     select @SourceStr = stuff(@SourceStr,1,@pos,'')     select @pos = charindex(@StrSeprate,@SourceStr) end select @SplitAndDistinctStr = '' select @SplitAndDistinctStr = @SplitAndDistinctStr + @StrSeprate + ret from (select distinct ret from @table) t return @SplitAndDistinctStr end GO

-----------测试------------

select distinct * from dbo.f_split('123|abc|000|777|000 |111', '|') Go select  dbo.SplitAndDistinct('123|abc|000|777|000|111 ', '|')

GO