March 2001
Intermediate to advanced
640 pages
14h 9m
English
book
Sams Teach Yourself Transact-SQL in 21 Days, Second Edition
by Lowell Mauer, David Solomon, Bennett McEwan
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Day 4. Working with Row Aggregates and Grouping
Now that you have learned to combine and manipulate columns to change data, you are ready for the next major step in the data retrieval process. Today you will learn how to use the aggregate functions to display a set of information that describes a group of rows. The topics we will discuss are
Using the aggregate functions: SUM(), AVG(), MIN(), MAX(), COUNT(), and COUNT_BIG
Understanding how nulls affect aggregate functions
Finding subtotals (and subaverages and so forth) with GROUP BY
Using HAVING to select from aggregate result sets
Displaying summary values with ROLLUP and CUBE
Using CASE to build a pivot table
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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.
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.