May 2019
Intermediate to advanced
484 pages
11h 23m
English
Content preview from Learn T-SQL Querying
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Knobs for query optimization
As advanced as the query optimization process is, inefficient plans are still a possibility, which is why a database developer can use hints in the T-SQL statement and guide the Query Optimizer toward producing an intended plan. There are several classes of thoroughly-documented query hints that affect query optimization, and it is important to call out a few that can be useful when troubleshooting a query performance issue, some of which we will use in upcoming chapters.
Keep in mind that hints force certain behaviors with T-SQL statement optimization and execution. Microsoft recommends that hints are thoroughly tested and only used as a last resort. Hinted statements must be reviewed with every upgrade to a ...
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