Introduction to Databases (SQL vs. NoSQL)

The same user can be stored as a row in a table or as a document in a collection, and the two choices behave differently from the first insert. This lesson stores one user both ways and compares what each database accepts, what it refuses, and what that means for a Node.js application.

Why an Application Needs a Database

The users API from the Express chapter kept its users in a JavaScript array. That array lives in the memory of the Node.js process, so every user disappears when the server restarts