July 2010
Intermediate to advanced
448 pages
12h 22m
English
Content preview from Physical Database Design
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198 CHAPTER 11 Query Execution Plans and Physical Design
useful. How so? Because if the database thinks the design feature is useful, it will exploit
it in the query execution plan. For example, if an index A is beneficial to a query at
runtime we should expect to see access to index A in the query execution plan for the
query. In this chapter we’ll show examples of the different ways that query execution
plans are presented both in text and graphically by the major database vendors, and
illustrate how they can help improve physical database design.
11.1 Getting from Query Text to Result Set
How does a query submitted to a database get transformed into an answer set? Figure
11.1 shows the basic order of operations that occurs for incoming SQL statements. ...
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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.