MongoDB – NoSQL Database

MongoDB is a document-oriented NoSQL database designed for scalability and developer productivity. Its flexible schema and powerful query language make it popular for modern applications.

Key Features

• Document Model: Store data as JSON-like documents
• Flexible Schema: No predefined structure required
• Aggregation: Powerful data processing pipeline
• Sharding: Horizontal scaling support
• Replication: High availability replica sets

Installation

Install MongoDB on Ubuntu:

wget -qO - https://www.mongodb.org/static/pgp/server-7.0.asc | sudo apt-key add -
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/7.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-7.0.list
sudo apt update
sudo apt install mongodb-org
sudo systemctl enable mongod
sudo systemctl start mongod

Usage Examples

MongoDB operations:

// Connect and use database
use myapp

// Insert document
db.users.insertOne({
    name: "John Doe",
    email: "john@example.com",
    roles: ["user", "admin"]
})

// Query with filter
db.users.find({ roles: "admin" })

// Aggregation pipeline
db.orders.aggregate([
    { $match: { status: "completed" } },
    { $group: { _id: "$customer", total: { $sum: "$amount" } } }
])

Benefits

MongoDB accelerates development with its flexible data model. Its native JSON support and horizontal scaling make it ideal for evolving applications and big data.

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