Step-by-step tutorial shows you how to combine your SQL queries (columns) with UNION, INTERSECT, and EXCEPT! Queries: 1) Get the combined unique values in 2 columns: SELECT column FROM table1 UNION SELECT column FROM table 2 2) Get the unique values that are present in 2 columns: SELECT column FROM table1 INTERSECT SELECT column FROM table 2 3) Get the values that aren't present in 2 columns: SELECT column FROM table 1 EXCEPT SELECT column FROM table 2 Get the Northwind Database: Support the Channel: 1) Subscribe: 2) DataCamp: 3) Udacity: