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Microsoft® SQL Server 2008 R2 Unleashed
book

Microsoft® SQL Server 2008 R2 Unleashed

by Ray Rankins, Paul Bertucci, Chris Gallelli, Alex T. Silverstein
September 2010
Intermediate to advanced content levelIntermediate to advanced
1704 pages
111h 8m
English
Sams
Content preview from Microsoft® SQL Server 2008 R2 Unleashed

Creating and Using Filtered Indexes

To define filtered indexes, you use the normal CREATE INDEX command but include a WHERE condition as a search predicate to specify which data rows the filtered index should include. In the current implementation, you can specify only simple search predicates such as IN; the comparison operators IS NULL, IS NOT NULL, =, <>, !=, >, >=, !>, <, <=, !<; and the logical operator AND. In addition, filtered indexes cannot be created on computed columns, user-defined data types, Hierarchyid, or spatial types.

For example, assume you need to search only the sales table in the bigpubs2008 database for sales since 9/1/2008. The majority of the rows in the sales table have order dates prior to 9/1/2008. To create a filtered ...

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Publisher Resources

ISBN: 9780768696585Purchase book