Hello *, I have many tables (one per product) and the are two columns where I put my buyed and selled pieces. Second I have a Main-Table with all products and a summary of the stock. What I want is, whenever I buy or sell something, the changements (buy/sell) in the product table must triger an update in the Main- Table. I am puzzeling arround, how can this be done. Any help welcome Thanks Michelle -- Linux-User #280138 with the Linux Counter, http://counter.li.org/ ##################### Debian GNU/Linux Consultant ##################### Michelle Konzack Apt. 917 ICQ #328449886 50, rue de Soultz MSM LinuxMichi 0033/3/88452356 67100 Strasbourg/France IRC #Debian (irc.icq.com)