In 7.4, how do I declare that a column in a table is to be automatically set to the value of some fixed expression whenever a row is updated? Eg column last_modified is always set to current_timestamp Chris -- Chris Velevitch Manager - Adobe Platform Users Group, Sydney m: 0415 469 095 www.apugs.org.au Adobe Platform Users Group, Sydney September meeting: It's Going To Be Brilliant Date: Mon 29th September 6pm for 6:30 start Details and RSVP on http://apugs2008september.eventbrite.com