December 2005
Intermediate to advanced
336 pages
4h 52m
English
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Chapter 11. Using Data Manipulation Functions
In this chapter, you’ll learn what functions are, what types of functions MySQL supports, and how to use these functions.
Understanding Functions
Like almost any other computer language, SQL supports the use of functions to manipulate data. Functions are operations that are usually performed on data, usually to facilitate conversion and manipulation.
An example of a function is the RTrim() that we used in the last chapter to trim any spaces from the end of a string.
Note
Functions Are Less Portable Than SQL. Code that runs on multiple systems is said to be portable. Most SQL statements are relatively portable, and when differences between SQL implementations do occur they are usually not that difficult ...
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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.
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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.