January 2020
Beginner
256 pages
5h 11m
English
Content preview from Sams Teach Yourself SQL in 10 Minutes a Day, 5th Edition
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Lesson 7. Creating Calculated Fields
In this lesson, you will learn what calculated fields are, how to create them, and how to use aliases to refer to them from within your application.
Understanding Calculated Fields
Data stored within a database’s tables is often not available in the exact format needed by your applications. Here are some examples:
You need to display a field containing the name of a company along with the company’s location, but that information is stored in separate table columns.
City, state, and ZIP codes are stored in ...
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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.