Chapter 9. Summarizing Data Results from a Query
In this hour, you learn about SQL’s aggregate functions. You can perform a variety of useful functions with aggregate functions.
The highlights of this hour include:
What functions are
How functions are used
When to use functions
Using aggregate functions
Summarizing data with aggregate functions
Results from using functions
What Are Aggregate Functions?
Functions are keywords in SQL used to manipulate values within columns for output purposes. A function is a command normally used in conjunction with a column name or expression that processes the incoming data to produce a result. SQL contains several types ...
Get Sams Teach Yourself SQL 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.
