split

CREATE function [dbo].[f_split](@SourceSql varchar(8000),@StrSeprate varchar(10))
returns @temp table(id varchar(100))
--实现split功能 的函数
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

create   function   [dbo].[f_split1](@c   varchar(2000),@split   varchar(2))  
  returns   @t   table(col   varchar(20))  
  as  
    begin  
   
      while(charindex(@split,@c)<>0)  
        begin  
          insert   @t(col)   values   (substring(@c,1,charindex(@split,@c)-1))  
          set   @c   =   stuff(@c,1,charindex(@split,@c),'')  
        end  
      insert   @t(col)   values   (@c)  
      return  
    end  

 DECLARE @count int
 DECLARE @c int
  DECLARE @r int
 SET @c= 0
 SELECT @count =count(*) FROM f_split1('1,2,3',',')
  WHILE @c< @count
    BEGIN
     set @c=@c+1
     --SELECT @r=col   FROM f_split1('1,2,3',',') WHERE
     --SELECT col,(ROW_NUMBER() OVER(ORDER BY  col asc)) AS RowNum FROM f_split1('1,2,3',',') WHERE RowNum=1
     select @r=col from 
(select Row_Number() Over(order by col desc) as RowNum, * 
from f_split1('7,5,6',',')) a
where RowNum=@c
      PRINT @r
    END