Transcription of Entity Relationship Model - WBUTHELP.COM
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chapter 2 Entity Relationship ModelThis chapter introduces the Entity - Relationship Model in detail. The chapter coversnumerous features of the Model , several of which can be omitted depending on theplanned coverage of the course. Weak Entity sets (Section ), design constraints(Section ) and aggregation (Section ), and the corresponding subsections ofSection (Reduction of an E-R Schema to Tables) can be omitted if time is short. Werecommend covering specialization (Section ) at least in some detail, since it isan important concept for object-oriented databases ( chapter 8).TheE-Rmodel itself andE-Rdiagrams are used often in the text. It is importantthat students become comfortable with them. TheE-Rmodel is an excellent contextfor the introduction of students to the complexity of database design.
CHAPTER 2 Entity Relationship Model This chapter introduces the entity-relationship model in detail. The chapter covers numerous features of the model, several of …
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