Table Triggers

Hello all,

I have a table and want to build a trigger on it so on insert, update, delete, it inserts some info in another table. My question is how can i tell when an specific action has occured because on insert i want it to have a function, on update another function and on delete another function. If it's any help i want to mention that i'm using 10.2.0.3 database on RHEL 5 32bit.

Thanx,

Dan.