Lecture 10: Aggregate Functions in SQL | Master SQL from Scratch | Lecture By Waiz Ahmed

In this lecture, we explore SQL Aggregate Functions — powerful tools that let you summarize and analyze data easily. These functions are essential for generating reports, dashboards, and business insights directly from your database.

Topics Covered:

Syntax:
SELECT AGGREGATE_FUNCTION(colname) FROM tablename;

What are Aggregate Functions?
Using COUNT, SUM, AVG, MIN, and MAX
Applying aggregates on numeric columns
Group calculations vs individual records
Real-world examples: total sales, average marks, highest salary

Examples Included (MySQL):

Calculate the total number of rows in a table
Find the average salary from an sales table

By mastering these functions, you can generate insights with just a few lines of SQL code.

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