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Sunday, May 15, 2011

Trigger Interview Questions

How many types of triggers are there in Sql Server 2005?
There are two types of triggers
• Data Manipulation language (DML) triggers
• Data Definition language (DDL) triggers
DML triggers (implementation) will run when INSERT, UPDATE, or DELETE statements modify data in a specified table or view.
DDL triggers will run in response to DDL events that occur on the server such as creating, altering, or dropping an object, are used for database administration tasks
What are the different modes of firing triggers?
After Trigger: An AFTER trigger fires after SQL Server completes all actions successfully
Instead of Triggers: An INSTEAD OF trigger causes SQL Server to execute the code in the trigger instead of the operation that caused the trigger to fire.

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