Thanks Miles. But i'm not satisfied with your answer. I instinctly created indexes on every field that I'm using w/ conditions. But I feel that my script can be rewritten more efficiently using JOINTs or other things.
Any site with reading material regarding how to index and make complex queries fast? I use the 'table_' just to hide the original table names prefixes. Elias "Miles Thompson" <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > General rule of thumb - create indexes on any fields which will be used in > the conditional part of a select statement, whether where or join. Since > you are working with tables, you can save yourself a lot of typing by > dropping the "table_" from the table names. After all, that's what they > are. (You can do this unless you've gone too far with your system.) > > Miles Thompson > > At 02:15 PM 8/14/2002 +0200, lallous wrote: > >give this query: > > > > SELECT > > table_routing.id AS routeid, > > table_pricing.units AS price, > > table_routing.provider AS providerid, > > table_country.name AS countryname, > > table_country.id AS countrycode > > FROM > > table_pricing, > > table_routing, > > table_country > > WHERE > > table_country.id = table_routing.country > > AND > > table_routing.country = table_pricing.country > > AND > > table_routing.provider = table_pricing.provider > > AND > > table_country.enabled = 1 > > ORDER BY routeid > > > >what keys / indexes should I create on whatever tables to make this query > >efficient? > >I don't know if this query can be re-written even with JOINs and stuff. > > > >Please advise, > > > >If you've got an online doc. about that it will help too. > > > > > >Elias > > > > > > > >-- > >PHP General Mailing List (http://www.php.net/) > >To unsubscribe, visit: http://www.php.net/unsub.php > > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php