NoSQL Flavors: Document, Key-Value, Column, Graph
Learners will compare the four NoSQL families and map each to real-world use cases.
The NoSQL Family Tree
"NoSQL" isn't one thing — it's a family of four: document, key-value, wide-column, and graph stores. MongoDB is a document store. Let's meet them all.
Document Stores: Rich Nested Data
Document stores keep data as flexible JSON-like documents, with nested objects and arrays all in one place. MongoDB leads here — the most versatile NoSQL type.
// Document store example - a product document
{
_id: 'prod_001',
name: 'Wireless Headphones',
category: 'Electronics',
specs: { battery: '30h', connectivity: 'Bluetooth 5.0' },
reviews: [
{ user: 'alice', rating: 5, comment: 'Great!' }
],
price: 79.99
}All lessons in this course
- The Relational Database Bottleneck
- NoSQL Flavors: Document, Key-Value, Column, Graph
- The CAP Theorem in Plain English
- Where MongoDB Fits In