Types of Triggers in PL/SQL

Triggers in PL/SQL are powerful database objects that are automatically fired or executed when certain events occur. There are several types of triggers in PL/SQL, each serving a different purpose:

1. BEFORE Triggers: These triggers are fired before a specified event occurs, such as before an INSERT, UPDATE, or DELETE operation. They are commonly used to validate data.
2. AFTER Triggers: These triggers are fired after a specified event occurs, such as after an INSERT, UPDATE, or DELETE operation. They are often used for auditing or logging purposes.
3. INSTEAD OF Triggers: These triggers are fired instead of the triggering event. They are commonly used in views to perform custom actions instead of the default database operation.
4. COMPOUND Triggers: These triggers are a combination of multiple triggers and can contain logic for multiple timing points (BEFORE, AFTER, INSTEAD OF) in a single trigger body.

Each type of trigger serves a unique purpose and can be customized to meet the specific requirements of the database environment.