MySQL Aggregate Functions - SUM,COUNT, MAX, MIN, AVG

In database management, an aggregate function or aggregation function, according to Wikipedia, is a function where the values of multiple rows are grouped to form a single summary value.

In database management, an aggregate function or aggregation function, according to Wikipedia, is a function where the values of multiple rows are grouped to form a single summary value.

There are different aggregate functions, such as SUM, COUNT, MAX, MIN, AVG, etc. In this tutorial, we’ll cover the most used aggregate function in detail.

Contents

• Introduction
• SUM
• COUNT
• MAX
• MIN
• AVG
• Conclusion

Introduction

Basically an aggragate function performs a calculation on a set of values, and returns a single value.

Consider the table of author that we usually use in our SQL tutorials. For illustration we added salary column.

Author Tabl

Let’s see how it works.

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