October 2006
Intermediate to advanced
464 pages
16h 11m
English
Content preview from Inside Microsoft® SQL Server™ 2005, Fourth EditionBecome 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,
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Special Indexes
SQL Server 2005 allows you to create two special kinds of indexes: indexes on computed columns and indexes on views. Without indexes, both of these constructs–computed columns and views–are purely logical. There is no physical storage for the data involved. A computed column is not stored with the table data; it is recomputed every time a row is accessed. A view does not save any data; it basically saves a SELECT statement that is re-executed every time the data in the view is accessed. With the new special indexes, SQL Server actually materializes what was only logical data into the physical leaf level of an index.
Prerequisites
Before you can create indexes on either computed columns or views, certain prerequisites must be met. ...
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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.