SQL SUM Function Tutorial: Calculate Totals & Aggregate Data

SQL SUM() function | SQL Tutorial for Beginners | 2021

SQL | Running SUM and Normal SUM in SQL | Define window for SUM function | Cumulative SUM in SQL

Basic Aggregate Functions in SQL (COUNT, SUM, AVG, MAX, and MIN)

Lec-67: SQL Aggregate Functions - SUM, AVG(n), COUNT, MIN, MAX Functions | DBMS

Advanced Aggregate Functions in SQL (GROUP BY, HAVING vs. WHERE)