Modelling Business Information using Entity-Relationship (ER) diagrams is a foundational technique for defining the structure, relationships, and rules of data within an organization . It acts as a bridge between business requirements and technical database design, enabling stakeholders to visualize the "things" (entities) a business cares about and how they interact. Core Components of ER Modelling
Introduces specific attributes, primary keys, and foreign keys, mapping out operational data rules without being database-specific. Modelling Business Information: Entity relation...
Countable objects, concepts, or events, such as Customer , Product , or Order . and foreign keys