MongoDB Tutorial

Master MongoDB fundamentals with our comprehensive tutorial. Learn through examples and hands-on practice.

Video Tutorial

Introduction to MongoDB

MongoDB is a popular NoSQL database that stores data in flexible, JSON-like documents. It provides high performance, high availability, and easy scalability.

Examples:

const { MongoClient } = require('mongodb');

// Connection URL
const url = 'mongodb://localhost:27017';
const client = new MongoClient(url);

// Database Name
const dbName = 'myproject';

async function main() {
  await client.connect();
  console.log('Connected successfully to MongoDB');
  
  const db = client.db(dbName);
  const collection = db.collection('documents');

  return 'MongoDB connection initialized';
}

main()
  .then(console.log)
  .catch(console.error)
  .finally(() => client.close());

Basic MongoDB connection setup using the Node.js driver

CRUD Operations in MongoDB

Learn how to perform Create, Read, Update, and Delete operations in MongoDB using the MongoDB Node.js driver.

Examples:

// Insert a document
await collection.insertOne({
  name: 'John Doe',
  age: 30,
  email: 'john@example.com'
});

// Find documents
const user = await collection.findOne({ name: 'John Doe' });

// Update a document
await collection.updateOne(
  { name: 'John Doe' },
  { $set: { age: 31 } }
);

// Delete a document
await collection.deleteOne({ name: 'John Doe' });

Basic CRUD operations in MongoDB

MongoDB Aggregation Pipeline

The aggregation pipeline is a powerful framework for data aggregation and transformation in MongoDB.

Examples:

const result = await collection.aggregate([
  // Match stage - filter documents
  { $match: { age: { $gt: 25 } } },
  
  // Group stage - group and calculate
  { $group: {
      _id: "$department",
      avgAge: { $avg: "$age" },
      totalEmployees: { $sum: 1 }
    }
  },
  
  // Sort stage - sort by average age
  { $sort: { avgAge: -1 } }
]).toArray();

console.log(result);

Using MongoDB's aggregation pipeline for complex data analysis