CIS 155                                     ASSIGNMENT

CIS 155                                     ASSIGNMENT

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CIS 207 ASSIGNMENT #3 Entity Relationship (E-R) Modeling Due date 2/12 50 points Based on the Chen E-R model diagram below, answer three questions below. 1. Use the following business rules to write all appropriate connectivities in the E-R diagram: a. A department employs many employees, but each employee is employed by one department. b. Some employees, known as "rovers," are not assigned to any department. c. A division operates many departments, but each department is operated by one division d. An employee may be assigned to many projects, and a project may have many employees assigned to it. e. A project must have at least one employee assigned to it. f. One of the employees manages each department, and each department is managed by only one employee. g. One of the employees runs each division, and each division is run by one employee. 2. Write all the cardinalities into the model. 3. Modify the E-R model by splitting the M:N relationship into two 1:M relationships that are connected through a composite entity. Then rewrite the connectivities and cardinalities to match the
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  • Fall '15
  • Entity-relationship model

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