We've learned how to write queries to retrieve information from the database. In this lesson we are going to learn how to perform calculations using SQL.
Aggregate functions compute a single result from a set of input values. For instance, when we need the sum or average of a particular column, we can use aggregate functions to quickly compute it for us. We will be learning about different aggregate functions in this lesson.
For this lesson we have given you a table named
fake_apps which is made up of data for fake mobile applications.