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
Working with
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Working with @@ERROR and @@ROWCOUNT
When you are writing T-SQL code that needs to check for both errors and the number of rows affected after your SQL statements, one of the common pitfalls is trying to get both the error status and the number of rows after a SQL statement runs. You have to remember that all SQL statements except the DECLARE statement reset the value of @@ROWCOUNT and @@ERROR to the status of the last command executed.
If after a SQL statement you check the value of @@ERROR, the statement used to check @@ERROR resets @@ROWCOUNT. If you check @@ROWCOUNT first, it resets the value of @@ERROR. To check both values, you need to use an assignment SELECT immediately after the SQL statement you are checking and capture both values ...
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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.