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SQL Server FAQ - "ALTER TRIGGER" - Modifying Existing Triggers
(Continued from previous topic...)
How To Modify Existing Triggers using "ALTER TRIGGER"?
If you want to make changes to an existing trigger,
you could use the "ALTER TRIGGER" statements to refine the trigger again.
The tutorial exercise below shows you how to modify the trigger defined
in a previous tutorial:
ALTER TRIGGER dml_message ON fyi_users
AFTER INSERT, UPDATE, DELETE
PRINT 'Time: '+CONVERT(VARCHAR(12),GETDATE());
PRINT 'Records are inserted, updated,'
+ ' or deleted in fyi_users';
UPDATE fyi_users SET email='john@fyicenter' WHERE id = 1;
Time: Jul 1 2007
Records are inserted, updated, or deleted in fyi_users
An extra printing statement is added the trigger.
(Continued on next topic...)
- What Are Triggers?
- What Are the Basic Features of a Trigger?
- How To Create a Simple Table to Test Triggers?
- How To Create a DML Trigger using CREATE TRIGGER Statements?
- How To Test a DML Trigger?
- How To List All Triggers in the Database with sys.triggers?
- How To Modify Existing Triggers using "ALTER TRIGGER"?
- How To Delete Existing Triggers using "DROP TRIGGER"?
- How To Get the Definition of a Trigger Back?
- How To Disable Triggers using "DISABLE TRIGGER"?
- How To Create a Trigger for INSERT Only?
- How To See the Event List of an Existing Trigger using sys.trigger_events?
- How To Access the Inserted Record of an Event?
- How To Access the Deleted Record of an Event?
- How To Improve the Trigger to Handle NULL Values?
- What Happens to a Trigger with Multiple Affected Rows?
- How To Override DML Statements with Triggers?
- How To Create a DDL Trigger using "CREATE TRIGGER" Statements?
- Can You Roll Back the DDL Statement in a Trigger?
- Can You Create a Logon Trigger in SQL Server 2005 Express Edition?