What is the main role and advantages of using the MongoDB database in a project?

MongoDB is a document-oriented NoSQL database that stores data in BSON format (extended JSON). The main role of MongoDB in a project is to provide flexible and scalable data storage, especially when the data structure can change frequently or is not fixed.

Advantages of using MongoDB:

• Flexible schema: no need to define the table structure in advance, which simplifies development and adaptation to changes.
• Scalability: supports horizontal scaling through sharding.
• High performance when working with large volumes of data and fast queries.
• Ease of integration with Node.js thanks to the official driver and popular ODMs like Mongoose.
• Support for complex queries and indexes, including geospatial and text indexes.

Example of usage with Node.js:

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

async function run() {
  const client = new MongoClient('mongodb://localhost:27017');
  await client.connect();
  const db = client.db('myproject');
  const users = db.collection('users');

  await users.insertOne({ name: 'Ivan', age: 30 });
  const user = await users.findOne({ name: 'Ivan' });
  console.log(user);

  await client.close();
}

run();