Trigger - Execute once database started.-

Question

Hi, It's possible to start trigger once database started even before any DML activity take place.
Basically I need to check & update existing record for with certain condition then update the data.
I should not do this manually using a procedure,... but instead a trigger have to do it automatically.
Is this possible,... does Oracle update any table when it starts up.? Maybe I can use that.
Please help..
Thanks in advance.
E.G
CREATE OR REPLACE TRIGGER check_warehouse
AFTER UPDATE
FOR EACH ROW
DECLARE
BEGIN
IF :new.employee > '4000' THEN
.. ...update... ok='false'
else
... set ok='True'
END IF;
END;

Answer 1

I don't think you need this at the database level. You may want to do this check in BEFORE UPDATE or BEFORE INSERT Table level trigger