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Data Modeling Made Simple with ER/Studio Data Architect by Steve Hoberman

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CHAPTER 4

Entities

Concepts of interest

Who, What, When, Where, Why, and How

Entities abound

This chapter defines an entity and instances and discusses the different categories of entities. The three different levels at which entities may exist, conceptual, logical, and physical, are also explained. We will practice creating entities in ER/Studio.

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