October 2012
Beginner
288 pages
4h 37m
English
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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 separated table columns.
• City, State, and ZIP codes are stored in separate columns (as they should be), but your mailing label printing program needs them retrieved as one correctly formatted field.
• Column data is in mixed upper and lowercase, and your report needs ...
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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.