JOIN
SQL
A Visual Explanation of SQL Joins
https://blog.codinghorror.com/a-visual-explanation-of-sql-joins/SQL Basics Cheat Sheet
https://learnsql.com/blog/sql-basics-cheat-sheet/SQL Tutorial
https://www.w3schools.com/sql/What is SQL? The Most Widely-Used Relational Database Language
https://www.simplilearn.com/tutorials/sql-tutorial/what-is-sql