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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

Clustered Indexes

When you create a clustered index, all rows in the table are sorted and stored in the clustered index key order. Because the rows are physically sorted by the index key, you can have only one clustered index per table. You can think of the structure of a clustered index as being similar to a filing cabinet: the data pages are like folders in a file drawer in alphabetical order, and the data rows are like the records in the file folder, also in sorted order.

You can think of the intermediate levels of the index tree as the file drawers, also in alphabetical order, that assist you in finding the appropriate file folder. Figure 34.16 shows an example of a clustered index tree structure.

Figure 34.16 The structure of a clustered ...

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Publisher Resources

ISBN: 9780768696585Purchase book