In a trigger, we first specify when the trigger is to be executed and then the action to be performed when the trigger executes. Triggers are used to specify certain integrity constraints and referential constraints that cannot be specified using the constraint mechanism of SQL. SQL Server triggers are special stored procedures that are executed automatically in response to the database object, database, and server events. A trigger in SQL is a procedural code that is automatically executed in response to certain events on a specified table. It is important to understand how these small codes make such a huge difference in database performance. In this article, you will learn how to implement triggers along with examples. Learn how to create and use SQL Server triggers for data consistency and auditing. See examples of DML and DDL triggers, trigger types, syntax and options.
