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An Entity-Relationship Model, or ER Model, is a conceptual representation of data that typically evolves through three stages: conceptual, logical, and physical.
Provides enough detail for database developers to build the actual system, including technical data types. Benefits of Entity-Relationship Modeling What is an Entity Relationship Diagram (ERD)? - Lucidchart
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 Modelling Business Information: Entity relation...
The associations between entities, such as a Customer "places" an Order .
Countable objects, concepts, or events, such as Customer , Product , or Order . An Entity-Relationship Model, or ER Model, is a
Introduces specific attributes, primary keys, and foreign keys, mapping out operational data rules without being database-specific.
Defines the high-level business scope and key concepts, focusing on business vocabulary rather than technical detail. Countable objects, concepts, or events, such as Customer
Specific properties describing an entity, such as Customer Name or Product Price .