Sql count group by

This guide will give you a detailed explanation (with examples) of all the typical uses of the COUNT() function. Exercises included!

The function in SQL is one of the most commonly used aggregate functions.

Aggregate functions in SQL are used to calculate statistics for a group of rows: counting the number of rows in each group, computing the sum of values in a group, finding the minimum or maximum value in a group, and so on.

The SQL function returns the number of rows returned by a query.

Count(1) in sql

In practice, the function can help you calculate the number of films in a database, the number of films in a specific genre, the number of films per director, etc.

If you're new to aggregate functions, I recommend our SQL Basics course.

It will teach you the basics of the function and other aggregate functions. If you're a seasoned SQL user, check out our SQL Practice track with interactive SQL practice exercises on various topics, including .

Using COUNT(*) – Counting Rows in the Result

The most common way to use is to use it with the asterisk () as the argument.

The asterisk tells the

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