On Fri, 14 Jun 2002, Francisco Reinaldo wrote: > Date: Fri, 14 Jun 2002 12:52:15 -0700 (PDT) > From: Francisco Reinaldo <[EMAIL PROTECTED]> > To: Steve Edberg <[EMAIL PROTECTED]>, Vandana <[EMAIL PROTECTED]> > Cc: Jay Blanchard <[EMAIL PROTECTED]>, > [EMAIL PROTECTED] > Subject: RE: Is the order same? > > Hi, > > I would not rely on the "insertion order" if I were > you. Honestly, I don't know how MySQL deals with it > but servers such as Microsoft SQL Server or even > Access won't provide a deterministic order unless you > sort using sort by. > SQL standard doesn't provide deterministic order. In fixed record size ISAM tables slots are reused (would expect that). Every book I've read says that order is "random" unless you sort.
> I recomend you to use sort by anyways if you need the > result sets sorted, you never know if you want to > migrate to another platform. To make things a little > bit faster, you can create some sorted indices. > > Good Luck! > --- Steve Edberg <[EMAIL PROTECTED]> wrote: > > At 12:00 PM -0500 6/14/02, Jay Blanchard wrote: > > >[snip] > > >When I say 'select * from table', can I always be > > assured of the > > >order in which the results are retrieved. If I > > issue the query a second > > >time, (assuming no new insertions on the table), > > will I get the results in > > >the same order, again? > > >[/snip] > > > > > >Yes. Data is always sorted from first entered to > > last entered unless you > > >change the sort with an ORDER BY or GROUP BY. > > > > > > ...unless you do any deletes and subsequent inserts, > > or you optimize > > the table, or MySQL decides to change internal > > record ordering, or... > > > > As a general rule in relational databases, results > > should always be > > considered an unordered set unless you EXPLICITLY > > specify an ORDER BY. > > > > - steve > > > > > > >HAGW! > > > > > >Jay > > >sql, mysql, query > > > > > > > > > -- > > > +------------------------------------------------------------------------+ > > | Steve Edberg > > [EMAIL PROTECTED] | > > | University of California, Davis > > (530)754-9127 | > > | Programming/Database/SysAdmin > > http://pgfsun.ucdavis.edu/ | > > > +------------------------------------------------------------------------+ > > | "If only life would imitate toys." > > | > > | - Ted Raimi, March 2002 > > | > > | - > > http://www.whoosh.org/issue67/friends67a.html#raimi > > | > > > +------------------------------------------------------------------------+ > > > > > --------------------------------------------------------------------- > > 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 > > > > > __________________________________________________ > Do You Yahoo!? > Yahoo! - Official partner of 2002 FIFA World Cup > http://fifaworldcup.yahoo.com > > --------------------------------------------------------------------- > 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 > Sincerely, William Mussatto, Senior Systems Engineer CyberStrategies, Inc ph. 909-920-9154 ext. 27 --------------------------------------------------------------------- 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
