GraphQL is a query language for APIs that enables efficient data fetching and flexible querying. This tutorial shows how to build a GraphQL server using Node.js, Express.js, and MongoDB by first creating an Express REST API, then integrating GraphQL and allowing GraphQL queries to retrieve data from MongoDB. The steps include setting up prerequisites like VS Code, Node.js, and a terminal, then creating the Express server, integrating GraphQL with MongoDB, and running and testing GraphQL queries.

1. NODE.JS AND GRAPHQL:
FROM SETUP TO SERVER,
YOUR COMPLETE TUTORIAL
LAKSHMAN.S
TECHNICAL LEAD | MICROSOFT STACK | DEVOPS | BLOGGER

2. CONTENTS
 What’s involved ?
 How it works ?
 How to implement ?

3. WHAT’S INVOLVED ?
1. GraphQL is a query language for APIs, designed to enable efficient data fetching and flexible data querying
2. Express.JS is a fast, unopinionated, and minimalist web application framework for Node.js.
3. Node.JS is server-side JavaScript runtime environment that allows developers to build scalable, high-performance
APIs.
4. VS Code is lightweight, open-source code editor with build-in support for programming languages.

4. HOW IT WORKS ?
1. First, we will create express.js rest api.
2. Integrate GraphQL with Mongo DB.
3. Run & Test GraphQL query.

5. HOW IT IMPLEMENT ?
 The Prerequisites are
 VS Code
 Node.JS
 Any Terminal.
DEMO

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