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Understanding ERD and EERD Concepts by Mahmoud Elmahdy is a document available to read on EtoBox.
What is Understanding ERD and EERD Concepts about?
The document defines key concepts in entity-relationship (ER) modeling: - An entity represents a real-world object with attributes that describe it. An entity set is a collection of similar entities. - A relationship associates two or more entities. A relationship set is a collection of similar relationships. - Attributes can be simple, composite, single-valued, multivalued, or derived. A key attribute uniquely identifies an entity. - Specialization/generalization allows entities to be organized into subcl
- Author
- Mahmoud Elmahdy
- Language
- EN