Real-World Data Models

Introduction

Theory only goes so far. This lesson walks through three real schemas — e-commerce orders, multi-tenant SaaS, and IoT telemetry — and explains the trade-offs each team made.

Understanding the topic

Patterns covered:

• E-commerce — embed line items, reference user, snapshot price.
• SaaS — one DB per tenant, shared cluster.
• IoT — time-series collection partitioned by device.

Real-world use

Every successful Mongo app you'll join has variants of these three patterns — recognizing them shortens your ramp-up.