The following ER diagram shows the working of an online shopping system. Entities are represented by square boxes; attributes of these entities are written within the square boxes, crucial to their identity and functionality. Relationships between entities are illustrated using crow foot notation. The ER diagram outlines the process of customer interaction with the system: from selecting an item within a specific category to placing an order. Through this visual representation, the system's structure, including entities such as products, categories, order and more, is shown.
