[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 1 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
Re: [PHP-DB] need help on improving performance on this querry
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 [EMAIL PROTECTED] To: [EMAIL PROTECTED] 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 1 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 -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] need help on improving performance on this querry
thank you! I did not know this command. Its 0.16s instead of 1.6! Andy [EMAIL PROTECTED] schrieb im Newsbeitrag 043c01c1f5f2$47f5b3e0$[EMAIL PROTECTED]">news:043c01c1f5f2$47f5b3e0$[EMAIL PROTECTED]... 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 [EMAIL PROTECTED] To: [EMAIL PROTECTED] 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 1 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 -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
