Aggregate functions and the GROUP BY clause

Welcome to this exciting new tutorial all about aggregation functions and the GROUP BY clause in PostgreSQL!

If you are looking to brush up on your database skills or are a beginner eager to expand your knowledge, this advanced course will take you through important concepts on SQL aggregate functions and the GROUP BY clause you will use it in the

We’ll start by introducing the concept behind relational databases and cover the basics of querying with SQL. We will now explain what aggregation functions are and how they perform calculations on data sets with different functions such as COUNT, SUM, AVG, MAX, and MIN. And don’t worry — we’ll take the time to break down exactly what each operation does and how it can be used in different situations.

Next, we delve into the GROUP BY section and show how it can filter and group data when using aggregation functions. With practical examples throughout, it never happened