November 2013
Intermediate to advanced
982 pages
34h 23m
English
book
Microsoft SQL Server 2012 Internals
by Bob Beauchemin Kalen Delaney Conor Cunningham, Jonathan Kehayias, Benjamin Nevarez, and Paul S. Randal
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Physical index structures for B-trees
Index pages for B-tree indexes have almost the same structure as data pages, except they store index rows instead of data rows. Like with all other types of pages in SQL Server, index pages use a fixed size of 8 KB, or 8,192 bytes. Index pages also have a 96-byte header, and an offset array at the end of the page has 2 bytes for each row to indicate the offset of that row on the page. A nonclustered index can have all three allocation units associated with it: IN_ROW_DATA, ROW_OVERFLOW_DATA, and LOB_DATA, as mentioned in Chapter 6 and discussed in detail in Chapter 8. Each index has a row in the sys.indexes catalog view, with an index_id value of either 1 (for a clustered index) or a number between 2 and 250 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.