Conceptual data modeling, entity types, weak entities, attribute types, relationship cardinalities (1:1, 1:N, M:N), and ER-to-Relational conversion rules.
Entity-Relationship (ER) Modeling & Conceptual Design 1. Core Building Blocks of ER Modeling Introduced by Peter Chen in 1976, the Entity-Relationship (ER) model captures the conceptual schema of an enterprise independently of any database software. A. Entities An entity is a distinct real-world object or concept (e.g., Lecturer, Student, Course). Strong Entity: Has independent existence and...…
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