View Design High Level Er Diagram Example Download Zip Background. Er diagrams are used to model and design relational databases, in terms of logic and business rules (in a logical data model) and in other examples: Context diagram an overview sciencedirect topics.
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It is good at representing triggers and scenarios through the use case. A related term is instance, in which the specific person or. For our example, we treat the relationship set work and the entity. This is where er modeling comes in.