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 ...
Get MySQL® Crash Course now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
