Logical database design and the relational model(database)
Ch 6 Logical D B Design
Chapter 5 1 © Prentice Hall, 2002 Chapter 5: Transforming EER Diagrams into Relations Mapping Regular Entities to Relations 1. Simple attributes: E-R attributes.
Keys are special fields that serve two main purposes: ◦ Primary keys are unique identifiers of the relation in question. Examples include employee numbers,
