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Entity-Relationship Model

Entity-Relationship Model. ER-Diagrams Weak entity sets. Outline: Conceptual modeling using ER-model Data modeling Entity-relationship model - Entity types - strong entities (regular) - weak entities - Relationships among entities - Attributes - attribute classification - Constraints

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2.36k views • 89 slides

Relational Model

Relational Model. The main reference of this presentation is the textbook and PPT from : Elmasri & Navathe, Fundamental of Database Systems, 4 th edition, 2004, Chapter 5 Additional resources: presentation prepared by Prof Steven A. Demurjian, Sr (http://www.engr.uconn.edu/~steve/courses.html).

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521 views • 45 slides

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Atomic value - PowerPoint PPT Presentation

Entity-Relationship Model

Relational Model