April 2006
Intermediate to advanced
640 pages
16h 46m
English
Content preview from Inside Microsoft® SQL Server™ 2005: T-SQL QueryingBecome 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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CUBE and ROLLUP
CUBE and ROLLUP are options available to queries that contain a GROUP BY clause. They are useful for applications that need to provide a changing variety of data aggregations based on varying sets of attributes or dimensions. (In the context of cubes, the word dimension is often used, either as a synonym for attribute or to describe a domain of values for an attribute.) I’ll first describe the CUBE option, and then follow with a description of the ROLLUP option, which is a special case of CUBE.
CUBE
Imagine that your application needs to provide the users with the ability to request custom aggregates based on various sets of dimensions. Say, for example, that your base data is the Orders table that I used earlier in the chapter, ...
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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.