RE: [PHP-DB] the opposite of a join?

Hi J, Checkout this, SELECT * FROM tbl_company where id not in (SELECT companyID from tbl_contacts) Regards, Lasitha Alawatta Application Developer Destinations of the World Holding Establishment P O Box: 19950 Dubai, United Arab Emirates ( Ph +971 4 295 8510 (Board) / 1464 (Ext.) 7 Fax +971 4 295 8910 + lasitha.a@dotw.com -----Original Message----- From: John Pillion [mailto:john@conv-dg.com] On Behalf Of jd.pillion@gmail.com Sent: Wednesday, October 03, 2007 2:21 PM To: php-general@lists.php.net; php-db@lists.php.net Subject: [PHP-DB] the opposite of a join? I have a company table and a contacts table. In the contacts table, there is a field called "companyID" which is a link to a row in the company table. What is the easiest way to query the company table for all the company rows whose ID is NOT linked to in the contact table? Basically, the opposite of a join? Thanks J DOTW DISCLAIMER: This e-mail and any attachments are strictly confidential and intended for the addressee only. If you are not the named addressee you must not disclose, copy or take any action in reliance of this transmission and you should notify us as soon as possible. If you have received it in error, please contact the message sender immediately. This e-mail and any attachments are believed to be free from viruses but it is your responsibility to carry out all necessary virus checks and DOTW accepts no liability in connection therewith. This e-mail and all other electronic (including voice) communications from the sender's company are for informational purposes only. No such communication is intended by the sender to constitute either an electronic record or an electronic signature or to constitute any agreement by the sender to conduct a transaction by electronic means.