At 12:31 PM 2/13/03 , Luc Foisy wrote:
> > I still don't understand do you mean the "actual" row
> number or just a
> > display number.
> > > There is no relevant data or use to this number.
> > > It is the row number of the returned result set, purely
> > > for display.
That means no field exists or should exist in the database. I only want to generate at query time.
I can't use an autoincrement field since that wont work very well with results that are returned out of order and maybe not with all the data.
Using variables is the best response to my question. I just dislike using them cause they are ugly to work with because of the session persistance and because I have to issue multiple queries to do the job.
I only want to issue one query.
Extending my previous email, you could use the fact that undefined variables are null to combine
set @x=0;
select (@x:=@x+1) as row_number,name,tag_length from library_master;
into one query:
select if(isnull(@x),@x:=1,@x:=@x+1) as row_number,name,tag_length from library_master;
Of course, you'll need to rest @x back to null (or 0) if you want to run this query again in the same session...
And as far as ugly, well - eye of the beholder, and all that stuff ;)
-steve
+------------------------------------------------------------------------+
| Steve Edberg [EMAIL PROTECTED] |
| Database/Programming/SysAdmin (530)754-9127 |
| University of California, Davis http://pgfsun.ucdavis.edu/ |
+---------------------- Gort, Klaatu barada nikto! ----------------------+
---------------------------------------------------------------------
Before posting, please check:
http://www.mysql.com/manual.php (the manual)
http://lists.mysql.com/ (the list archive)
To request this thread, e-mail <[EMAIL PROTECTED]>
To unsubscribe, e-mail <[EMAIL PROTECTED]>
Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
