drawingRelationship-Assignment (1).docx - www.oracle.com/academy Database Design 3-3 Speaking ERDish and Drawing Relationships Practice Activities

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Database Design 3-3: Speaking ERDish and Drawing Relationships Practice Activities Objectives State relationships between entities in precise words (ERDish) Draw and label relationships correctly on an ERD Vocabulary Identify the vocabulary word for each definition below. ERDish The language or statements used to describe relationships between entities in an entity-relationship diagram. Try It / Solve It 1. The goal of this practice is to read a relationship. Which text corresponds to the diagram? a. Each EMPLOYEE may be assigned to one or more DEPARTMENTs. Each DEPARTMENT must be responsible for one or more EMPLOYEEs. b. Each EMPLOYEE must be assigned to one and only one DEPARTMENT. Each DEPARTMENT must be responsible for one or more EMPLOYEEs. c. Each EMPLOYEE must be assigned to exactly one DEPARTMENT. Each DEPARTMENT may be responsible for exactly one EMPLOYEE. 2. In the diagram for #1 identify the symbols for cardinality.
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  • Fall '15
  • KathyHlaner

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