May 2019
Intermediate to advanced
484 pages
11h 23m
English
Content preview from Learn T-SQL Querying
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OptimizerStatsUsage
OptimizerStatsUsage can expand to show additional information on which statistics objects were used by the Query Optimizer for a given compilation. When analyzing a query plan that has performance problems, a database professional can use this information to see which statistics were loaded for use during query optimization, and also whether statistics need to be updated, which may be a root cause for performance problems grounded on CE issues.
Here is the detail for this property for the example query:
The detailed elements of OptimizerStatsUsage are the following, and are repeated for every statistic object loaded for ...
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