Module 03: Data Modeling

In this module, we shift our mindset from “Relational” to “Document-Oriented.” You will learn that while MongoDB is schema-less, your application is not.

Chapters

  1. Schema Design: The “Together” Rule

Understand the physics of disk I/O and why embedding data drastically improves read performance compared to SQL joins.

  1. Relationships: Embed or Reference?

Master the Cardinality Spectrum. Learn when to embed (1:Few) and when to reference (1:Squillions) to avoid the 16MB document limit.

  1. Defensive Modeling: Schema Validation

Implement “Governed Schemas” using JSON Schema validation to enforce data integrity without sacrificing flexibility.

  1. Module Review

Test your knowledge with flashcards and review the modeling cheat sheet.

Module Chapters