Relational databases take extra consideration when you are learning about how databases work, but they are worth it.
Relational databases let you work with information in much the same way you do with other things in your life, organizing similar information into groups and then trying to eliminate duplicates of information wherever possible.
We'll cover relational databases in this module. At the end of this module, you should understand what it means to have a normalized database and what that means to the queries you create using SQL.