take a look at the syntax for an oracle trigger here:
there's an example there, and you can see how fields are referenced with the :columnname indicator
see if that helps you build a better trigger;
http://www.techonthenet.com/oracle/triggers/after_update.php
Lowell
--
help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!