June 2014
Intermediate to advanced
804 pages
22h 17m
English
Content preview from Pro SQL Server Internals
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CHAPTER 17
Lock Types
There are more than 20 different lock types in SQL Server. As the first step we will look at the major ones and understand when and how SQL Server uses them.
When session inserts, updates, or deletes the row SQL Server acquires exclusive (X) lock on that row and holds it until the end of the transaction. As you can guess by the name—exclusive means exclusive—only one session can hold exclusive (X) lock on the resource at any given point of time. This would protect the object (row, for example) from being modified by other sessions. I would like to repeat one of the key points here: exclusive (X) locks are held until 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.