mongodb

name	mongodb
description	MongoDB document database with aggregation pipeline and Atlas. Use for document storage.

MongoDB

MongoDB is a document database. It stores data in JSON-like documents (BSON). It is the most popular NoSQL database, known for flexibility and scalability.

When to Use

• Rapid Prototyping: Schema-less design allows iterating fast without migrations.
• Content Management: Storing diverse assets with varying metadata.
• Catalogs: Product catalogs where each product has different attributes (size, color, wattage).

Quick Start

// Using Mongoose (Node.js)
const kittySchema = new mongoose.Schema({
  name: String,
});
const Kitten = mongoose.model("Kitten", kittySchema);

const silence = new Kitten({ name: "Silence" });
await silence.save();

Core Concepts

Documents (BSON)

Data is stored in "documents" (JSON objects) inside "collections" (Tables). { "_id": 1, "name": "Apple", "price": 10 }

Embedded Data vs References

• Embed: Store related data inside the document for fast reads. (e.g., Comments inside a Post).