Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
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Chapter 4, Problem 4.17RQ
Explanation of Solution
IE Crow’s Foot E-R diagram:
IE is information engineering and it uses crow’s feet to denote many side of relationship. Hence it is referred as IE Crow’s feet ER diagram.
IE Crow’s Foot E-R diagram for the entities DEPARTMENT and EMPLOYEE:
Explanation:
- The “Department” entity contains an attributes of “Dep_Name”, “Dep_ID”, and “Dep_Location”...
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Students have asked these similar questions
Draw an ER-Diagram for this situation and place minimum and maximum cardinalities on the diagram?
Entity type:
• EMPLOYEE with attribute: EmpID , Name (Firstname :besan, Lname) , Address :Amman, Birth_of_Date25/5/02 .
• DEPARTMENT with attribute : DeptID , DeptName , Loc
Relationship:
Works_in Relationship between EMPLOYEE and DEPARTMENT and each employee is works in zero or many department and each department worked by one or many employee.
draw an E-R diagram that indicates the entity sets and their attributes. Identify and label significant relationship sets between pairs of entities, the degree of relationship sets and the cardinality and participation constraints.
Design the Entity Relationship Diagram (ERD) showing entities, attributes, primary key and relationship cardinality for the
following scenario.
Any employee works for only a department and under supervision of a manager (where manager is also an employee).
Employee's address, city code & city name also has been recorded. Every employee may work for multiple project, but an
employee may be on vacation and not assigned to any projects. Working hour may be different for an employee for
different projects. Projects are broken into tasks; A task is created for one project and assigned to one department.
Requisitions are made for projects; Each requisition could ask for any number of items; Items could be: equipment item
or materials item and are coded in a similar way; Each requisition is for one project and is made to one supplier.
The important data fields are employee_id, employee_name ,employee_address, employee_email, department_id,
department_name, location, city_code, city_name,…
Chapter 4 Solutions
Database Concepts (8th Edition)
Ch. 4 - Prob. 4.1RQCh. 4 - Prob. 4.2RQCh. 4 - Prob. 4.3RQCh. 4 - What is a use case, and what is its purpose?Ch. 4 - Give an example of a data constraint.Ch. 4 - Prob. 4.6RQCh. 4 - Define the term entity, and give an example other...Ch. 4 - Explain the difference between an entity class and...Ch. 4 - Define the term attribute, and give examples for...Ch. 4 - Define the term identifier, and indicate which...
Ch. 4 - Prob. 4.11RQCh. 4 - Prob. 4.12RQCh. 4 - Prob. 4.13RQCh. 4 - Prob. 4.14RQCh. 4 - List and give an example of the three types of...Ch. 4 - Prob. 4.16RQCh. 4 - Prob. 4.17RQCh. 4 - Prob. 4.18RQCh. 4 - Define the term weak entity, and give an example...Ch. 4 - Explain the ambiguity in the definition of the...Ch. 4 - Define the term associative entity, and give an...Ch. 4 - Define the terms supertype, subtype, and...Ch. 4 - What is an exclusive subtype relationship? Give an...Ch. 4 - What is an inclusive subtype relationship? Give an...Ch. 4 - Prob. 4.25RQCh. 4 - Prob. 4.26RQCh. 4 - Prob. 4.27RQCh. 4 - Prob. 4.28RQ
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