Jens Vonderheide wrote: > > > Message From To > > > > Exampel 1 2 > > > > UserID UserName > > 1 Me > > 2 You > > > > Message From To > > Exampel Me You > > SELECT > u.Message, u1.UserName AS From, u2.UserName AS To > FROM > Messages AS m, > Users AS u1, > Users AS u2 > WHERE > m.From = u1.UserID AND > m.To = u2.UserID
Does left join (as I posted) work quicker/more efficient than this, which has more rows (rows of m * rows of u1 * rows of u2) after join before where/on? > > Using aliases, you can reference the same table multiple times. > > Jens > > --------------------------------------------------------------------- > 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
