Trigger: In a database , a trigger is a program joined to a particular table or view. It will executed by the DBMS (Database Management System), when certain events may occur using that table. It can be executed before or after the “SQL” commands which use the “INSERT”, “UPDATE” or “DELETE” operations or once for each modified row. If a trigger event has occurs, the trigger’s function will called at the time of handling the event. These events are handled using “BEFORE”, “AFTER” or “INSTEAD OF” trigger logics.

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Chapter 7, Problem 7.5RQ

Program Plan Intro

Trigger:

In a database, a trigger is a program joined to a particular table or view. It will executed by the DBMS (Database Management System), when certain events may occur using that table.

It can be executed before or after the “SQL” commands which use the “INSERT”, “UPDATE” or “DELETE” operations or once for each modified row.

If a trigger event has occurs, the trigger’s function will called at the time of handling the event.

These events are handled using “BEFORE”, “AFTER” or “INSTEAD OF” trigger logics.

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