Re: need help on improving performance on this querry

thank you! I did not know this command. Its 0.16s instead of 1.6! Andy <szii@sziisoft.com> schrieb im Newsbeitrag news:043c01c1f5f2$47f5b3e0$fd02a8c0@surfmetro.com... > SELECT DISTINCT L.* > from data.languages L, data2.user U > WHERE L.id IN (U.language_1, U.language_2, U.language_3) > order by name; > > I believe the IN clause is a shade faster than multiple ORs, but > I'm not 100% sure. > > 'Luck > > -Szii > > ----- Original Message ----- > From: "andy" <news.letters@gmx.de> > To: <php-db@lists.php.net> > Sent: Tuesday, May 07, 2002 9:38 AM > Subject: [PHP-DB] need help on improving performance on this querry > > > > Hi there, > > > > I do have a user table with 3 languages. I know that I should have put them > > into a seperate table. I still could, but would take lots of recoding. I > > discovered, that as soon as I leave out the OR statements the querry takes > > under 0.2 s. With the two OR it takes on a 10000 records about 1.4 s. > > > > Is there a way to increase the performance with a different querry? I did > > already index the fields, but does not look much better though. > > > > SELECT DISTINCT L.* > > from data.languages L, data2.user U > > where > > L.id = U.language_1 > > or L.id = U.language_2 > > or L.id = U.language_3 > > order by name > > > > Thanx for any help, > > > > Andy > > > > > > > > -- > > PHP Database Mailing List (http://www.php.net/) > > To unsubscribe, visit: http://www.php.net/unsub.php >