CREATE FUNCTION [dbo].[FDT_DELETE_ZK_SPACE](
@str nvarchar(4000)
) returns nvarchar(4000)
as
begin
declare @endp int,@endflag int,@length int,@i int,@j int, @appstr nvarchar(4000)
,@reversestr nvarchar(4000),@return_str nvarchar(4000)
select @endflag = 0,@length=len(@str),@i=1,@reversestr = reverse(@str),@endp = 0
if(SUBSTRING(@reversestr,1,1) = ‘ ‘)
begin
return @str
end
while (@endflag = 0 and @i<=@length)
begin
if(SUBSTRING(@reversestr,@i,1) != ‘ ’)
begin
set @endflag = 1
set @endp = @length – @i + 1
end
set @i = @i + 1
end
set @return_str = substring(@str,1,@endp)
set @j=1
set @appstr= ”
while(@j<=2*(@i-2))
begin
set @appstr = @appstr + ‘ ‘
set @j = @j + 1
end
set @return_str = @return_str + @appstr
return @return_str
end
转载于:https://www.cnblogs.com/JoePotter/p/4992188.html