entity-relationship diagrams

Entity-Relationship Diagrams (ERDs) are visual tools used to represent the relationships between different entities within a system, often used in database design. Each entity, like a person, place, or thing, is depicted as a rectangle, while relationships between them are shown as lines connecting these rectangles. ERDs help organize and clarify how data is structured and how entities interact, making it easier to understand complex information and to design systems that store and manage data effectively. They serve as a blueprint for creating a database, ensuring all necessary data relationships are considered.