Let's now see how you would access a database, such as MySQL, PostgreSQL, MSSQL, Oracle, or more. (We will be needing this in Chapter 4, Implementing RESTful Services with Node, when we get to build a set of services.) Accessing a database is frequently done, so that's what we will be doing. I chose some geographical data (with countries, their regions, and the cities in those), to which we'll later add something else, to work with more complex examples.