November 2009
Intermediate to advanced
576 pages
12h 25m
English
Content preview from Oracle SQL Recipes: A Problem-Solution ApproachBecome 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 5. Common Query Patterns
In this chapter we introduce recipes to handle many common query patterns, often for the sort of problems that you know should have an elegant solution, but for which no obvious SQL command or operator exists. Whether it's predicting the trend in data for extrapolation and planning purposes, paginating your data for display on a web site, or finding lost text in your database, you'll find a recipe to suit you in this chapter.
Many of the problems we address here have multiple solutions. Where space allows, we've tried to cover as many options as possible. Having said that, if you invent or know of a different approach, consider yourself a budding SQL chef too!
Changing Nulls into Real Values
Problem
You want to substitute ...
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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.