January 2020
Beginner
896 pages
23h 51m
English
Content preview from Microsoft SQL Server 2019: A Beginner's Guide, Seventh Edition, 7th Edition
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CHAPTER |
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24 |
Business Intelligence and Transact-SQL |
In This Chapter
• Standard and Nonstandard Analytic Functions
Have you ever tried to write a Transact-SQL query that computes the percentage change in values between the last two quarters? Or one that implements cumulative sums or sliding aggregations? If you have ever tried, you know how difficult these tasks are. Today, you don’t have to implement them anymore. The SQL standard has adopted a set of online analytical processing (OLAP) functions that enable you to easily perform these calculations and many others that used to be very complex for implementation. This part of the SQL standard is called SQL/OLAP. Therefore, ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.