September 2010
Intermediate to advanced
1704 pages
111h 8m
English
book
Microsoft® SQL Server 2008 R2 Unleashed
by Ray Rankins, Paul Bertucci, Chris Gallelli, Alex T. Silverstein
Content preview from Microsoft® SQL Server 2008 R2 Unleashed
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Using DML Triggers
DML triggers are invoked when a DML event occurs in the database. DML events manipulate or modify the data in a table or view. These events include insertions, updates, and deletions.
DML triggers are powerful objects for maintaining database integrity and consistency. They are able to evaluate data before it has been committed to the database. During this evaluation period, these triggers can perform a myriad of actions, including the following:
• Compare before and after versions of data.
• Roll back invalid modifications.
• Read from other tables, including those in other databases.
• Modify other tables, including those in other databases.
• Execute local and remote stored procedures.
Based on the nature of these actions, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.