Create an ER model for each of the following descriptions:a)Each company operates four departments, and each department belongs to one company.b)Each department in part (a) employs one or more employees, and each employee works for one department.c)Each of the employees in part (b)may or may not have one or more dependents, and each dependentd)belongs to one employee.e)Each employee in part (c) may or may not have an employment history.f)Represent all the ER models described in (a), (b), (c), and (d) as a single ER mod

Create an ER model for each of the following descriptions:a)Each company operates four departments, and each department belongs to one company.b)Each department in part (a) employs one or more employees, and each employee works for one department.c)Each of the employees in part (b)may or may not have one or more dependents, and each dependentd)belongs to one employee.e)Each employee in part (c) may or may not have an employment history.f)Represent all the ER models described in (a), (b), (c), and (d) as a single ER mod

Database Systems: Design, Implementation, & Management

12th Edition

ISBN:9781305627482

Author:Carlos Coronel, Steven Morris

Publisher:Carlos Coronel, Steven Morris

Chapter4: Entity Relationship (er) Modeling

Section: Chapter Questions

Problem 1RQ

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Question 1: Case Description INU Printing Press, a part of a university undertakes printing jobs from different departments of the University. The press can take printing-related orders from other organizations or individuals also, but this is a rare practice. Orders once placed cannot be canceled. Any financial transactions of the various departments with the printing press are done through the University Office only. The University Office maintains the accounts of the press and the various departments of the University. The press acquires its inventory from outside suppliers. This is done by accepting the quotations from various suppliers and placing orders respectively. They maintain information of vendors/suppliers for the raw materials. A supplier can supply more than one item and an item can be supplied by more than one supplier. The supplier may supply the item in parts. Stock for a particular item can be acquired more than once a year. The suppliers send two copies of the…
Create an ER model for each of the following descriptions: a. Each company operates four departments, and each department belongs to one company. b. Each department in part (a) employs one or more employees, and each employee works for one department. c. Each of the employees in part (b) may or may not have one or more dependents, and each dependent belongs to one employee. d. Each employee in part (c) may or may not have an employment history. e. Represent all the ER models described in (a), (b), (c), and (d) as a single ER model.
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