Online gaming store ERD models a complete transactional database with five core entities: USERS, GAMES, ORDERS, ORDER_ITEMS, and REVIEWS. Data flows from user authentication through order placement, with ORDER_ITEMS bridging many-to-many relationships between ORDERS and GAMES, while REVIEWS enable user-generated ratings and feedback. This normalized schema eliminates data redundancy, enforces referential integrity through foreign keys, and supports inventory tracking and order history queries essential for retail operations. Fork this diagram on Diagrams.so to customize field types, add payment or shipping tables, or export as .drawio for your database design documentation. The mandatory relationships (solid lines) between USERS-ORDERS and GAMES-ORDER_ITEMS ensure data consistency, while optional REVIEWS relationships allow flexible user engagement.