Pl sql if inserting updating
In this chapter, we will discuss Triggers in PL/SQL.
Triggers are stored programs, which are automatically executed or fired when some events occur.
keywords to create a new trigger, the name of the new trigger must not match any existing trigger defined on the same table.
New triggers will be created in the same schema as the table on which the triggering event is defined.
Triggers can be: Trigger names must be unique with respect to other triggers in the same schema.:old.sal); dbms_output.put(' New salary: '