Why Backends Need Databases

In earlier examples, data was stored directly in code, such as arrays or simple variables. This works for learning, but it has serious limitations.

When the server restarts, all data is lost. There is no way to persist information between sessions.

File-based storage can solve this partially, but it becomes hard to manage as the application grows. Reading and writing files manually is slower, less flexible, and not designed for handling large amounts of data.

Real applications need a reliable way to store, update, and retrieve data efficiently. They also need to handle multiple users and frequent changes.

This is where databases come in.

A database is designed to store data in a structured way, making it easy to query, update, and manage. It allows your backend to keep data safe and accessible at any time.