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Using Triggers In MS SQL Server


Triggers allow us to execute a batch of SQL code when either an insert, update or delete command is executed against a specific table. In this article David will describe exactly what triggers are, he will show you how to create new triggers from scratch, how to test triggers, and also provide you with some valuable links/books to help you learn more about triggers.

Author Info:
By: David Rusik
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January 01, 2002
TABLE OF CONTENTS:
  1. · Using Triggers In MS SQL Server
  2. · What exactly is a trigger?
  3. · UPDATE and DELETE triggers
  4. · Conclusion

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Using Triggers In MS SQL Server - Conclusion
(Page 4 of 4 )

When triggers are used correctly, they can save a lot of development work. One of the main benefits of using triggers is that they are stored in a central repository (the database), meaning that they are accessible from all client applications / web pages that can connect to the database.

Before triggers came along, if we had a table that needed to be updated and we wanted to perform some actions after that update, then we would have to "hard code" the extra SQL into our application. This meant that if we wanted to change the code later down the track, then each client would need the updated version of our application. This is both annoying and time consuming.

If you're in the field of database design / development, and haven't seen triggers before, then you should take a look at some of the books and links below. They will give you some great information and examples about triggers and how to properly integrate them into your n-Tier applications.
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