February 2018
Intermediate to advanced
960 pages
22h 7m
English
book
SQL Queries for Mere Mortals: A Hands-On Guide to Data Manipulation in SQL, 4th Edition
by John L. Viescas
Content preview from SQL Queries for Mere Mortals: A Hands-On Guide to Data Manipulation in SQL, 4th Edition
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5Getting More Than Simple Columns
“Facts are stubborn things.”
—TOBIAS SMOLLETT GIL BLAS DE SANTILLANE
Topics Covered in This Chapter
What Type of Data Are You Trying to Express?
Changing Data Types: The CAST Function
In Chapter 4, “Creating a Simple Query,” you learned how to use a SELECT statement to retrieve information from one or more columns in a table. This technique is useful if you’re posing only simple requests to the database for some basic facts. However, you’ll need to expand your SQL vocabulary when you begin working with complex requests. In ...
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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.