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Entity-Relationship Model

实体关系模型(Entity-Relationship Model,ER Model) 基础元素为实体(实体是现实世界中的事物/对象,实体之间相互独立)、实体之间的关系。

实体关系模型常见于设计 数据库 时。

Database System Concepts

The entity-relationship (E-R) data model uses a collection of basic objects, called entities,andrelationships among these objects. An entity is a “thing” or “object” in the real world that is distinguishable from other objects. The entity-relationship model is widely used in database design.[1]

  1. Abraham Silberschatz, Henry F. Korth, and S. Sudarshan, Database System Concepts, Seventh edition (New York, NY: McGraw-Hill, 2020). P8 ↩︎