GraphQL Fundamentals

Welcome to GraphQL! It's a powerful query language for APIs and a runtime for fulfilling those queries with your existing data.

Think of it as asking for exactly what you need, nothing more, nothing less. This helps make your APIs efficient and flexible.

Traditionally, REST APIs often require multiple requests to fetch all necessary data, leading to "over-fetching" or "under-fetching".

• Over-fetching: Getting more data than you need.
• Under-fetching: Needing multiple requests to get all data.

GraphQL solves this by letting clients define the exact data structure they want in a single request.