ERD
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Entity Relationship Diagram(ERD)Modeling 2019. 8. 25. 11:53
1. Overview An entity-relationship diagram (ERD) shows the relationships of entity sets stored in a database. An entity in this context is an object, a component of data. An entity set is a collection of similar entities. These entities can have attributes that define its properties. 2. Description 2.1 Entity An ERD entity is a definable thing or concept within a system, such as a person/role (e..