This video explains how to use various aggregate functions along with Group By and Having.
1. sum()
2. count()
3. avg()
4. min()
5. max()

00:00 - SQL Aggregate Functions
00:29 - COUNT Function in SQL
00:49 - AVERAGE Function in SQL
00:56 - SUM Function in SQL
01:01 - MIN Function in SQL
01:05 - MAX Function in SQL
01:15 - GROUP BY in SQL