September 2007
Intermediate to advanced
448 pages
13h 52m
English
book
Inside Microsoft® SQL Server™ 2005: Query Tuning and Optimization
by Kalen Delaney, Sunil Agarwal, Craig Freedman, Ron Talmage, Adam Machanic
Content preview from Inside Microsoft® SQL Server™ 2005: Query Tuning and Optimization
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Summary
In this chapter, we examined the role of optimization in query processing and discussed some of the steps that the optimizer goes through in coming up with an execution plan for your queries. Keep in mind that for all but the simplest queries, there are many possible plans that the optimizer could evaluate. In order to be able to optimize in a reasonable amount of time, SQL Server’s optimizer may stop searching for better plans as soon as it finds one that it considers “good enough.” The vast majority of the time, the SQL Server query processor works extremely well. The optimizer generally chooses satisfactory query plans, and most applications just work. For those occasions where problems do arise, we looked at a variety of issues and ...
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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.