Modern Database Management
Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Chapter 3, Problem 3.18PAE

Examine the hierarchy for the university EER diagram (Figure 3-10). As a student, you are an instance of one of the subtypes: either UNDERGRAD STUDENT or GRADUATE STUDENT. List the names of all the attributes that apply to you. For each attribute, record the data value that applies to you.

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What is the difference between a recurring group and an attribute that may take on many values?
Draw an E-R diagram for a bank.  It should include at least customers, checking accounts and loans, and appropriate relationships between them. Note: To keep this to a resonable size, you should limit yourself to at most six entities and at most eight attributes per entity.
Prepare an E-R diagram for a Aqarat (real estate) Company that lists property for sale. The following describes this organization: The company has a several number of offices. Attributes of office include Office_Number (identifier) and Location. Each office is assigned one or more employees. Attributes of employee include Employee_ID (identifier) and Employee_Name. An employee must be assigned to only one sales office. For each office, there is always one employee assigned to manage that office. An employee may manage only the office to which she is assigned. The company lists property for sale. Attributes of property include Property_ID (identifier) and Location. Components of Location include Address, City, State, and Zip_Code. Each unit of property must be listed with one (and only one) of the offices. A office may have any number of properties listed, or may have no properties listed. Each unit of property has one or more owners. Attributes of owners are Owner ID (identifier) and…

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Modern Database Management

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