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Microsoft® SQL Server 2012 Unleashed by Alex T. Silverstein, Chris Gallelli, Paul T. Bertucci, Ray Rankins

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Types of Indexes

SQL Server has two main types of indexes: clustered and nonclustered. They both help the query engine get at data faster, but they have different effects on the storage of the underlying data. The following sections describe these two main types of indexes and provide some insight into when to use each type.

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