Aggregate Functions | Complete PostgreSQL Course: Beginner to Pro
Автор: Backend Knights
Загружено: 2026-01-27
Просмотров: 16
Описание:
In this video of our Complete PostgreSQL Course, we dive deep into Aggregate Functions! You'll learn how to perform calculations on multiple rows of a single column of a table and return a single value. We cover the essential functions every backend engineer needs: COUNT, SUM, AVG, MIN, and MAX.
We will also explore how to combine these with the GROUP BY clause to generate powerful data summaries and analytics directly from your database.
In this video, we cover:
Understanding Aggregate Functions in SQL
Practical examples of SUM, AVG, and COUNT
Finding minimum and maximum values (MIN/MAX)
Common mistakes and best practices for Backend Engineers
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