The Entity-Relationship Model

The Entity-Relationship (ER) Model is a way to visually represent how data is organized in a system. It uses diagrams with shapes to show "entities" (things like people or products) and their "attributes" (details about those things). Lines connect entities to show how they relate, such as a customer placing an order. This model helps design databases by clearly illustrating the types of data needed and their relationships, making it easier to build efficient and organized data storage systems.