August 2012
Intermediate to advanced
1416 pages
33h 39m
English
book
Microsoft SQL Server 2012 Bible
by Adam Jorgensen, Jorge Segarra, Patrick LeBlanc, Jose Chinchilla, Aaron Nelson
Content preview from Microsoft SQL Server 2012 Bible
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Chapter 10
Aggregating, Windowing, and Ranking Data
In This Chapter
Understanding Basic Aggregations
Using SQL Server Aggregation Functions
Customizing Aggregation Sets
Understanding Windowing
Ranking Functions
Information is the foundation of most organizational decisions. In its raw form, that data is meaningless and offers little value to an information wonk or data analyst; not until the data is summarized or grouped is it considered useful information. Although summarization and analysis can certainly be performed with other tools, such as Reporting Services, Analysis Services, PowerPivot, or an external tool such as SAS, SQL is a set-based language, and a fair amount of summarizing and grouping can be performed well within the SQL SELECT statement.
SQL excels at calculating sums, max values, and averages for the entire data set or for segments of data. In addition, the product of SQL queries can be as simple as a table to a complex pivot table that includes subtotals and totals. In this chapter you explore different ways to group, gather, and summarize data within SQL Server.
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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.