Learn SQL

COUNT operator

14.1

Lesson

# Count all students

Find the total number of students.

We can use `COUNT`

to solve this problem.

Here we are using ***** to indicate that we want to count
all students.

`COUNT`

is the first of **aggregate functions** we will see in this course.
An **aggregate function** is used to perform some calculations on data.
Count, average, sum, maximum and minimum are examples of aggregate function.