creating-altering-and-removing-triggers.md

title	Creating, Altering, and Removing Triggers | Microsoft Docs
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ms.date	03/06/2017
ms.prod	sql-server-2014
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ms.technology
ms.topic	reference
helpviewer_keywords	triggers [SMO]
ms.assetid	8ddbe23b-6e31-4f8e-8a70-17bd5072413e
author	stevestein
ms.author	sstein
manager	craigg

Creating, Altering, and Removing Triggers

In SMO, triggers are represented by using the xref:Microsoft.SqlServer.Management.Smo.Trigger object. The [!INCLUDEtsql] code that runs when the trigger that is fired is set by the xref:Microsoft.SqlServer.Management.Smo.Trigger.TextBody%2A property of the Trigger object. The type of trigger is set by using other properties of the xref:Microsoft.SqlServer.Management.Smo.Trigger object, such as the xref:Microsoft.SqlServer.Management.Smo.Trigger.Update%2A property. This is a Boolean property that specifies whether the trigger is fired by an UPDATE of records on the parent table.

The xref:Microsoft.SqlServer.Management.Smo.Trigger object represents traditional, data manipulation language (DML) triggers. In [!INCLUDEssKatmai] and later versions, data definition language (DDL) triggers are also supported. DDL triggers are represented by the xref:Microsoft.SqlServer.Management.Smo.DatabaseDdlTrigger object and the xref:Microsoft.SqlServer.Management.Smo.ServerDdlTrigger object.

Example

[!INCLUDEssChooseProgEnv]

Creating, Altering, and Removing a Trigger in Visual Basic

This code example shows how to create and insert an update trigger on an existing table, named Sales, in the [!INCLUDEssSampleDBnormal] database. The trigger sends a reminder message when the table is updated or a new record is inserted.

Creating, Altering, and Removing a Trigger in Visual C#

This code example shows how to create and insert an update trigger on an existing table, named Sales, in the [!INCLUDEssSampleDBnormal] database. The trigger sends a reminder message when the table is updated or a new record is inserted.

{  
            //Connect to the local, default instance of SQL Server.   
            Server mysrv;  
            mysrv = new Server();  
            //Reference the AdventureWorks2012 database.   
            Database mydb;  
            mydb = mysrv.Databases["AdventureWorks2012"];  
            //Declare a Table object variable and reference the Customer table.   
            Table mytab;  
            mytab = mydb.Tables["Customer", "Sales"];  
            //Define a Trigger object variable by supplying the parent table, schema ,and name in the constructor.   
            Trigger tr;  
            tr = new Trigger(mytab, "Sales");  
            //Set TextMode property to False, then set other properties to define the trigger.   
            tr.TextMode = false;  
            tr.Insert = true;  
            tr.Update = true;  
            tr.InsertOrder = ActivationOrder.First;  
            string stmt;  
            stmt = " RAISERROR('Notify Customer Relations',16,10) ";  
            tr.TextBody = stmt;  
            tr.ImplementationType = ImplementationType.TransactSql;  
            //Create the trigger on the instance of SQL Server.   
            tr.Create();  
            //Remove the trigger.   
            tr.Drop();  
        }  

Creating, Altering, and Removing a Trigger in PowerShell

This code example shows how to create and insert an update trigger on an existing table, named Sales, in the [!INCLUDEssSampleDBnormal] database. The trigger sends a reminder message when the table is updated or a new record is inserted.

# Set the path context to the local, default instance of SQL Server and to the  
#database tables in Adventureworks2012  
CD \sql\localhost\default\databases\AdventureWorks2012\Tables\  
  
#Get reference to the trigger's target table  
$mytab = Get-Item Sales.Customer  
  
# Define a Trigger object variable by supplying the parent table, schema ,and name in the constructor.  
$tr = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Trigger -argumentlist $mytab, "Sales"  
  
# Set TextMode property to False, then set other properties to define the trigger.
$tr.TextMode = $false  
$tr.Insert = $true  
$tr.Update = $true  
$tr.InsertOrder = [Microsoft.SqlServer.Management.SMO.Agent.ActivationOrder]::First  
$tr.TextBody = " RAISERROR('Notify Customer Relations',16,10) "  
$tr.ImplementationType = [Microsoft.SqlServer.Management.SMO.ImplementationType]::TransactSql  
  
# Create the trigger on the instance of SQL Server.
$tr.Create()  
  
#Remove the trigger.
$tr.Drop()