Using Database Maps to help write SQL queries

Use this video to help understand what is meant by a "Database Map", WHY it is important, and HOW it helps you write SQL queries that JOIN tables together.
Note minor mistake in the top-left corner of the Map. DriverFK values should be format "d000_" not "d00_". Although the Map shows incorrect values, the database itself has been corrected, which is why the query demonstrations work ok.