E-Commerce Database Architecture

A complete relational database design project for a full-featured e-commerce platform. Models physical and digital products, subscriptions, training programs, customer management, orders, inventory, deliveries, reviews, and supplier relationships. Focused on proper ER modeling, normalization, and query design.

The Problem

E-commerce platforms need databases that can handle complex relationships — products with variants, subscription models, inventory tracking, multi-step delivery, and review systems. The challenge was designing a schema that handles all these relationships cleanly while remaining performant and maintainable.

The Approach

Started with conceptual ER diagrams, then restructured to eliminate inheritance for relational compatibility. Normalized the schema to Third Normal Form. Designed a comprehensive SQL query suite for customer management, order processing, inventory tracking, and review aggregation.

Technical Details

• Entity-Relationship modeling with cardinality mappings
• Database normalization to Third Normal Form (3NF)
• SQL query suite for CRUD operations and analytics
• Generalization/specialization handling for product types
• Foreign key constraint design for referential integrity

Outcomes

• Designed a complete, normalized schema for a real-world e-commerce platform
• Created comprehensive ER diagrams with proper constraint documentation
• Built a reusable query suite for common business operations