Job-Ready SQL in an Afternoon - Unions

The video tutorial explains how to join tables vertically using SQL. It begins by discussing scenarios where vertical joins are necessary, such as when data is split across multiple tables. The tutorial then demonstrates creating subset tables using the CREATE TABLE statement and shows how to use the UNION statement to combine these tables vertically. It also covers extending the UNION operation to multiple tables and concludes with a discussion on cleaning up the database by dropping temporary tables.

What should you consider when splitting a large table into smaller tables?

What are the advantages of using UNION statements to join tables?

How can you clean up your database after creating temporary tables?