What Are Triggers in SQL Server

Q

What Are Triggers in SQL Server?

✍: FYIcenter.com

A

A trigger is a special kind of stored procedure that automatically executes when an event occurs in the database server. A trigger is really an event handler. SQL Server allows users to create triggers (event handlers) for 3 types of events:

DML Event - Occurs when a DML (Data Manipulation Language) statement: INSERT, UPDATE or DELETE, is executed.
DDL Event - Occurs when a DDL (Data Definition Language) statement: CREATE, ALTER, or DROP, is executed.
Logon Event - Occurs when a user logins to the Server.

There are 3 different types of triggers (event handlers) based on the types of events they are triggered by:

DML Trigger - Executes in response to a DML event.
DDL Trigger - Executes in response to a DDL event.
Logon Trigger - Executes in response to a logon event.

⇒ Basic Features of a Trigger in SQL Server

⇐ Creating and Managing Triggers in SQL Server

⇑ Creating and Managing Triggers in SQL Server

⇑⇑ SQL Server Database Tutorials

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"CREATE TRIGGER" - Creating a DML Trigger in SQL Server
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What Are Triggers in SQL Server
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