December 2013
Intermediate to advanced
1872 pages
153h 31m
English
book
Microsoft® SQL Server 2012 Unleashed
by Ray Rankins, Paul T. Bertucci, Chris Gallelli, Alex T. Silverstein
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Identifying Changed Columns
In addition to information about which rows were changed and the operation that caused the change (insert, update, or delete—reported as I, U, or D in the SYS_CHANGE_OPERATION), the CHANGETABLE(CHANGES ...) function also provides information on which columns were modified if you enabled the TRACK_COLUMNS_UPDATED option. You can use this information to determine whether any action is needed in your client application based on which columns changed.
To identify whether a specific column has changed, you can use the CHANGE_TRACKING_IS_COLUMN_IN_MASK (column_id, change_columns) function. This function interprets the SYS_CHANGE_COLUMNS bitmap value returned by the CHANGETABLE(CHANGES ...) function and returns a 1 if the ...
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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.