Getting Started with DocumentDB(NOSQL)

This is a beginner-friendly introduction to DocumentDB and how you can build an API with it.

What You Will Learn

• How NoSQL stores data — collections, documents, BSON, and why there is no fixed schema
• The five core DocumentDB CRUD commands — find, insert, update, delete, and findAndModify
• Aggregation — using aggregate, count, and distinct for computed results across documents
• NestJS architecture — modules, controllers, services, and the dependency injection lifecycle
• Zod validation — schema-first validation at the HTTP boundary instead of buried inside business logic
• MongoDB driver patterns — working with the raw driver (no ORM) so you clearly understand what reaches the database using Mongo Query Language(MQL).