Aggregate functions compute a single result from a set of multiple input values. You can think of aggregate data as data collected from multiple rows at a time. In this lesson, we’ll continue learning about aggregate functions by focusing on conditionals, sums, and combining aggregate functions.
Conditional Aggregates are aggregate functions that compute a result set based on a given set of conditions.
If you are new to aggregate functions, we recommend you complete this course first.
count function is an aggregate function, since it aggregates data from multiple rows.
Count the number of rows in the
flights table, representing the total number of flights contained in the table.