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The Entity-Relationship Model

The Entity-Relationship Model. Chapter 2. Overview of Database Design. Conceptual design : ( ER Model is used at this stage.) What are the entities and relationships in the enterprise? What information about these entities and relationships should we store in the database?

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ICS 321 Fall 2009 Schema Refinement & Normal Forms (iii)

ICS 321 Fall 2009 Schema Refinement & Normal Forms (iii). Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. Decompositions. Reduces redundancies and anomalies, but could have the following potential problems:

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The Entity-Relationship Model

ICS 321 Fall 2009 Schema Refinement &amp; Normal Forms (iii)

ICS 321 Fall 2009 Schema Refinement & Normal Forms (iii)