October 2015
Beginner
206 pages
4h 4m
English
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Summary
In this chapter, we discussed views and virtual columns. These topics are logically related, because views can be considered as virtual tables.
We examined views and learned how to manage or query them. We discussed their limitations, and some of the purposes for which they could be used. In particular, we learned how they can improve the database security.
Then we discussed virtual columns. This term includes both VIRTUAL and PERSISTENT columns; the former are calculated on-the-fly when needed, and the latter are stored on disk. We discussed how this feature can help us with some practical examples. The examples also showed how PERSISTENT columns can be used to build useful indexes, or to create powerful UNIQUE checks.
In the next chapter, ...
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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.