Skip to Main Content
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 Index Indications

Searching for rows via a clustered index is almost always faster than searching for rows via a nonclustered index—for two reasons. One reason is that a clustered index contains only pointers to pages rather than pointers to individual data rows; therefore, a clustered index is more compact than a nonclustered index. Because a clustered index is smaller and doesn’t require an additional lookup via the row locator to find the matching rows, the rows can be found with fewer page reads than with a similarly defined nonclustered index. The second reason is that because the data in a table with a clustered index is physically sorted on the clustered key, searching for duplicate values or for a range of clustered key values ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Microsoft® SQL Server 2005 Unleashed

Microsoft® SQL Server 2005 Unleashed

Ray Rankins, Paul Bertucci, Chris Gallelli, Alex T. Silverstein, Tudor Trufinescu, John Kane
Microsoft® SQL Server™ 2005 Administrator's Companion

Microsoft® SQL Server™ 2005 Administrator's Companion

Edward Whalen, Marcilina Garcia, Burzin Patel, Stacia Misner, Victor Isakov
Microsoft® SQL Server® 2008 Internals

Microsoft® SQL Server® 2008 Internals

Paul Randal Kalen Delaney Kimberly Tripp, and Conor Cunningham

Publisher Resources

ISBN: 9780768696585Purchase book