Help me in creating a Trigger for Insert and Update Options

Question

Hi
Please help me in creating a Trigger .
My requirement is that after insert or update on a Table , i want to fire an event .
I have started this way ,but doesn't know how to fully implement this .
say i have a dept table
CREATE TRIGGER DepartmentTrigger
AFTER INSERT ON Dept
BEGIN
INSERT INTO mytable VALUES("123","Kiran");
END DepartmentTrigger;
Please tell me how can i put the Update option also .
Thanks in advance .

Answer 1

Please tell me how can i put the Update option also .Add "Or Update". ;-)
Here are a few suggestions, but you definitely need to refer to the manual page that the previous poster suggested.
CREATE OR REPLACE TRIGGER DepartmentTrigger
AFTER INSERT Or Update ON Dept
BEGIN
INSERT INTO mytable VALUES(:new.Dept,'DEPT ADDED OR CHANGED');
END DepartmentTrigger;
The "Or Replace" means you can replace the trigger while you're developing without having to type in a drop statement every time. Just change and rerun your script, over and over until you get it right.
Adding "Or Update" or "Or Delete" makes the trigger fire for those events too. Note, you may want seperate triggers in different scripts and with different names for each event. You have to decide if your design really does the same thing whether it's an insert or an update.
:new.Dept is how you would refer to the changed vale of the Dept column (:old.Dept is the prior value). I changed the double quotes on the string in the VALUES clause to single quotes.
Andy