---
title: "Trigger Functions (Transact-SQL) | Microsoft Docs"
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ms.date: "03/08/2017"
ms.prod: sql
ms.prod_service: "sql-database"
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ms.technology: t-sql
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  - "TSQL"
ms.assetid: 3d77ac6d-5eb5-4cd6-ab60-46290ac4d9ce
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---
# Trigger Functions (Transact-SQL)
[!INCLUDE[tsql-appliesto-ss2012-xxxx-xxxx-xxx-md](../../includes/tsql-appliesto-ss2012-xxxx-xxxx-xxx-md.md)]

  The following scalar functions can be used in the definition of a trigger to test for changes in data values or to return other data.  
  
## In This Section  
 [COLUMNS_UPDATED](../../t-sql/functions/columns-updated-transact-sql.md)  
  
 [EVENTDATA](../../t-sql/functions/eventdata-transact-sql.md)  
  
 [TRIGGER_NESTLEVEL](../../t-sql/functions/trigger-nestlevel-transact-sql.md)  
  
 [UPDATE()](../../t-sql/functions/update-trigger-functions-transact-sql.md)