About This Architecture

Users and Orders ER diagram models a foundational e-commerce relational schema with two entities: Users (storing identity, contact, and authentication) and Orders (capturing order details linked to users via foreign key). The users table enforces unique constraints on phone and email, while orders references users through user_id as a foreign key, establishing a one-to-many relationship. This schema pattern demonstrates proper normalization, referential integrity, and constraint design essential for transactional systems handling customer data and order fulfillment. Fork and customize this diagram on Diagrams.so to adapt it for your application's specific fields, add indexes, or extend with additional entities like products or payments.

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How do I design a relational database schema for users and orders with proper keys and constraints?

This ER diagram shows a two-entity relational schema where the users table stores user identity and authentication data with unique constraints on phone and email, while the orders table captures order details and references users via a foreign key on user_id. This one-to-many relationship ensures referential integrity and demonstrates normalization best practices for e-commerce applications.