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SQL Server FAQ - "CREATE TRIGGER" - Creating a DML Trigger

By: FYIcenter.com

(Continued from previous topic...)

How To Create a DML Trigger using CREATE TRIGGER Statements?

A DML trigger is a trigger declared to handle a DML event, which occurs when an INSERT, UPDATE or DELETE statement is executed. If you want to create a DML trigger, you should use the "CREATE TRIGGER" statement in the following format:

CREATE TRIGGER trigger_name ON table_name
AFTER INSERT, UPDATE, DELETE 
AS
  statements
GO

The tutorial exercise below shows you a very simple DML trigger defined on the fyi_users table. It does nothing but printing a simple static message.

USE FyiCenterData;
GO

CREATE TRIGGER dml_message ON fyi_users
AFTER INSERT, UPDATE, DELETE 
AS
  PRINT 'Records are inserted, updated,'
    + ' or deleted in fyi_users';
GO
Command(s) completed successfully.

A simple DML trigger is defined on fyi_users now.

(Continued on next topic...)

  1. What Are Triggers?
  2. What Are the Basic Features of a Trigger?
  3. How To Create a Simple Table to Test Triggers?
  4. How To Create a DML Trigger using CREATE TRIGGER Statements?
  5. How To Test a DML Trigger?
  6. How To List All Triggers in the Database with sys.triggers?
  7. How To Modify Existing Triggers using "ALTER TRIGGER"?
  8. How To Delete Existing Triggers using "DROP TRIGGER"?
  9. How To Get the Definition of a Trigger Back?
  10. How To Disable Triggers using "DISABLE TRIGGER"?
  11. How To Create a Trigger for INSERT Only?
  12. How To See the Event List of an Existing Trigger using sys.trigger_events?
  13. How To Access the Inserted Record of an Event?
  14. How To Access the Deleted Record of an Event?
  15. How To Improve the Trigger to Handle NULL Values?
  16. What Happens to a Trigger with Multiple Affected Rows?
  17. How To Override DML Statements with Triggers?
  18. How To Create a DDL Trigger using "CREATE TRIGGER" Statements?
  19. Can You Roll Back the DDL Statement in a Trigger?
  20. Can You Create a Logon Trigger in SQL Server 2005 Express Edition?

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