January 2020
Beginner
896 pages
23h 51m
English
Content preview from Microsoft SQL Server 2019: A Beginner's Guide, Seventh Edition, 7th Edition
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CHAPTER |
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19 |
Query Optimizer |
In This Chapter
• How Query Optimization Works
• Tools for Editing the Optimizer Strategy
The question that generally arises when the Database Engine (or any other relational database system) executes a query is how the data that is necessary for the query can be accessed and processed in the most efficient manner. The component of a database system that is responsible for the processing is called the query optimizer.
The task of the query optimizer (or just optimizer) is to consider a variety of possible execution strategies for querying the data in relation to a given query and to select the most efficient strategy. The selected strategy is called the ...
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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.