June 2010
Intermediate to advanced
328 pages
7h 51m
English
Content preview from SQL Antipatterns
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Chapter 16Random Selection
The generation of random numbers is too important to be left to chance.
Robert R. Coveyou
You’re writing a web application that displays advertisements. You’re supposed to choose a random ad on each viewing so that all your advertisers have an even chance of showing their ads and so that readers don’t get bored seeing the same ad repeatedly.
Things go well for the first few days, but the application gradually becomes more sluggish. A few weeks later, people are complaining that your website is too slow. You discover it’s not just psychological; you can measure a real difference in the page load time. Your readership is starting to lose interest, and traffic is declining.
Learning from past experiences, you first ...
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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.