December 2013
Intermediate to advanced
1872 pages
153h 31m
English
book
Microsoft® SQL Server 2012 Unleashed
by Ray Rankins, Paul T. Bertucci, Chris Gallelli, Alex T. Silverstein
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Nonclustered Indexes
A nonclustered index is a separate index structure, independent of the physical sort order of the data rows in the table. You are therefore not restricted to creating only 1 nonclustered index per table; in fact, in SQL Server 2012 you can create up to 999 nonclustered indexes per table. This is an increase from SQL Server 2005, which was limited to 249.
A nonclustered index is analogous to an index in the back of a book. To find the pages on which a specific subject is discussed, you look up the subject in the index and then go to the pages referenced in the index. With nonclustered indexes, you may have to jump around to many different nonsequential pages to find all the references.
A nonclustered index is also structured ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.