April 2024
Intermediate to advanced
127 pages
2h 29m
English
Content preview from Learn SQL using MySQL in One Day and Learn It WellBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 8: Views
In the last three chapters, we learned to write some pretty complex SELECT statements to get information from our databases.
In this chapter, we’ll learn another concept that is closely related to SELECT statements - the concept of views.
What is a view?
Simply stated, an SQL view is a virtual table.
In contrast to actual tables, views do not contain data. Instead, they contain SELECT statements. The data to display is retrieved using those SELECT statements.
One advantage of using views is that it allows programmers to simplify their code. They can write relatively complex SELECT statements to join multiple tables into a single virtual table. Once that is done, they can access that virtual table like a normal 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.