August 2013
Intermediate to advanced
340 pages
10h 42m
English
Content preview from Expert PHP and MySQL: Application Design and Development
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CHAPTER 4
The Database
. . . database design in general is still mostly an artistic endeavor, not a scientific one . . .
—C. J. Date, Date on Database
UNIONs are usually not well optimized. . . . If possible, use UNION ALL instead.
—Joe Celko's SQL Programming Style
Never specify ALL.
—C. J. Date, SQL and Relational Theory
It seems that database design is an art and SQL technique is a matter of opinion. In this chapter I try to give you some guidelines that will help you with the art. You’ll also get my opinions about SQL. As you’ll learn, I’m not an SQL aficionado like Joe Celko, and certainly not a theoretician like Chris Date. I do ...
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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.