Summation

Hi. I'm relatively new to Oracle and SQL. My question is this: I have a table with columns x and y which are both integer values. i need to get the sum of the values in x and in y to put into column z. i need the sum to occur automatically whenever the values in x and y change. Can anyone help as to how to do this? Thanks a lot.

Brice Toth
bat107_at_psu.edu Received on Fri Mar 21 1997 - 00:00:00 CST