The "REPLACE" staement might work for you... http://dev.mysql.com/doc/refman/4.1/en/replace.html...
-----Original Message----- From: Kebbel, John [mailto:[EMAIL PROTECTED] Sent: 01 June 2007 15:31 To: mysql@lists.mysql.com Subject: Find and Add Unmatched Records I have a table of middle school students I want to update quarterly. I am only interested in finding and adding new students (not in finding and deleting students who have been dropped from the school district). I'm pretty sure I could put together a PHP script that would do this, but is there a MySQL way for one MySQL table (preceding quarter) to scan another MySQL table (current quarter) by primary key (student id number) and absorb the unmatched, new students? I'm thinking that if f I could bypass PHP, I could use MySQL triggers to automatically add new records to other, related tables. This email is confidential and may also be privileged. If you are not the intended recipient please notify us immediately by telephoning +44 (0)20 7452 5300 or email [EMAIL PROTECTED] You should not copy it or use it for any purpose nor disclose its contents to any other person. Touch Local cannot accept liability for statements made which are clearly the sender's own and are not made on behalf of the firm. Touch Local Limited Registered Number: 2885607 VAT Number: GB896112114 Cardinal Tower, 12 Farringdon Road, London EC1M 3NN +44 (0)20 7452 5300 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
