Databases generally fall into 2 classes: NoSQL and SQL. I'd stick with SQL based databases such as MySQL, Postgre, and SQLite. For the most part, they can be in

Databases generally fall into 2 classes: NoSQL and SQL. I'd stick with SQL based databases such as MySQL, Postgre, and SQLite. For the most part, they can be interchangeable. MongoDB falls into the former and is an entirely different way of thinking about databases.