Why MongoDB?

MongoDB is a document database storing data as flexible JSON-like documents. Schema-less design allows rapid development and easy scaling.

Basic Operations

// Insert
db.users.insertOne({ name: "John", email: "john@email.com" });

// Find
db.users.find({ age: { $gte: 18 } });
db.users.findOne({ email: "john@email.com" });

// Update
db.users.updateOne(
  { _id: ObjectId("...") },
  { $set: { age: 26 } }
);

// Delete
db.users.deleteOne({ _id: ObjectId("...") });

Mongoose with Node.js

const userSchema = new mongoose.Schema({
  name: { type: String, required: true },
  email: { type: String, unique: true },
  createdAt: { type: Date, default: Date.now }
});

const User = mongoose.model('User', userSchema);

const user = await User.create({ name: 'John', email: 'j@e.com' });

Conclusion

MongoDB excels for applications with evolving schemas and complex data relationships. Mongoose provides structure with flexibility.