Yes but when it's written "DISTINCT is converted to a GROUP BY on all columns", which columns are included in "all columns" ? :)
Thanks, Jocelyn ----- Original Message ----- From: "Carsten Gehling" <[EMAIL PROTECTED]> To: "Fournier Jocelyn [Presence-PC]" <[EMAIL PROTECTED]>; "DL Neil" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Sunday, April 14, 2002 7:46 PM Subject: SV: How does DISTINCT really work ? > > Fra: Fournier Jocelyn [Presence-PC] [mailto:[EMAIL PROTECTED]] > > Sendt: 14. april 2002 19:22 > > > In fact what it's odd is when I use EXPLAIN, I don't see anywhere DISTINCT > > in the EXPLAIN result : > > That's because the MySQL optimizer converts your distinct into a group by. > Read more here: > > http://www.mysql.com/doc/D/I/DISTINCT_optimisation.html > > - Carsten > > > > --------------------------------------------------------------------- > 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 > > --------------------------------------------------------------------- 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
