Modelling Business Information: Entity Relation... Apr 2026

Defines the numerical context of relationships, such as One-to-One (1:1), One-to-Many (1:N), or Many-to-Many (M:N). The Three Levels of Data Modelling

Introduces specific attributes, primary keys, and foreign keys, mapping out operational data rules without being database-specific. Modelling Business Information: Entity relation...

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 Defines the numerical context of relationships, such as