November 2025
Beginner to intermediate
336 pages
7h 48m
English
book
SQL for Data Analytics - Fourth Edition
by Jun Shan, Haibin Li, Matt Goldwasser, Upom Malik, Benjamin Johnston
Content preview from SQL for Data Analytics - Fourth Edition
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14
A Case Study for Analytics Using SQL
So far in this book, you have learned about the various features and functionalities offered by SQL. Now, if you take a step back and think about the fundamental question of “why” (i.e., why do you need these features and functionalities at all), you will see that it all stems from the need for data analysis.
Data originates in individual activities. Each activity creates its own data point and context. When the data of all the activities in a certain domain is collected and grouped together, statistical patterns emerge. As discussed from the very first chapter of this book, ancient Egyptian pharaohs collected census information to determine the size of the army they could recruit, and modern companies ...
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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.