September 2010
Intermediate to advanced
1704 pages
111h 8m
English
book
Microsoft® SQL Server 2008 R2 Unleashed
by Ray Rankins, Paul Bertucci, Chris Gallelli, Alex T. Silverstein
Content preview from Microsoft® SQL Server 2008 R2 Unleashed
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Query Statistics
In addition to the new dynamic management objects, SQL Server 2008 still provides the SET STATISTICS IO and SET STATISTICS TIME options, which display the actual logical and physical page reads incurred by a query and the CPU and elapsed time, respectively. These two SET options return actual execution statistics, as opposed to the estimates returned by SSMS and the SHOWPLAN options discussed previously. These two tools can be invaluable for determining the actual cost of a query.
In addition to the IO and TIME statistics, SQL Server also provides the SET STATISTICS PROFILE and SET STATISTICS XML options. These options are provided to display execution plan information while still allowing the query to run.
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