Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 4, Problem 7P
Explanation of Solution
Entity Relational (ER) Diagram:
The following figure illustrates the ER Diagram for given business rules using Crow’s Foot notation:
Explanation:
The above ERD, contains several entities such as “VOLUNTEER”, “ASSIGNMENT”, “LIST”, “ACTION”, “ITEM”, “PACKAGE_CONTENT” and “PACKAGE”. Each entity has its own attributes.
- A volunteer can have assignment for several tasks. Similarly, a task can be done by several volunteers. Hence the relationship between the entities “VOLUNTEER” and “ACTION” is M: N...
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Using the Crow’s Foot notation, create an ERD that can be implemented for a medical clinic, using the following business rules:
A patient can make many appointments with one or more doctors in the clinic, and a doctor can accept appointments with many patients. However, each appointment is made with only one doctor and one patient.
Emergency cases do not require an appointment. However, for appointment management purposes, an emergency is entered in the appointment book as “unscheduled.”
If kept, an appointment yields a visit with the doctor specified in the appointment. The visit yields a diagnosis and, when appropriate, treatment.
With each visit, the patient’s records are updated to provide a medical history.
Each patient visit creates a bill. Each patient visit is billed by one doctor, and each doctor can bill many patients.
Each bill must be paid. However, a bill may be paid in many installments, and a payment may cover more than one bill.
Show all connectivities, relationship…
Using the Crow's foot notation,create an ERD that can be implemented for a medical clinic using the following business rules:A patient can make many appointments with one or more doctors in the clinic,and a doctor can accept appointments with many patients.however each oppointment is made with only one doctor and one patient.Emergency patients do not ned an appointment .However,for appointment management purposes,an emergency is entered in the appointment book as"unscheduled."If kept,an appointment yields a visit with the doctor specified in the appointment.The visit yields a diagnosis and ,when appropriate, treatment.With each visit,the patient's records are updated to provide a medical history.Each patient visit creates a bill.Each patient visit is billed by one doctor,and each doctor can bill many patients.Each bill must be paid.However a bill may be paid in many instalments,and a payment may cover more than one bill.A patient may pay the bill directly,or the bill may be the basis…
Suppose we want to develop a browser-based training system to help people prepare for such a certification exam.
A user can request a quiz for the system. The system picks a set of questions from its database, and compose them together to make a quiz. It rates the user’s answers, and gives hints if the user requests it. In addition to users, we also have tutors who provide questions and hints. And also examinators who must certify questions.
List down the functional requirements of the above said system?
Use Form based method for specifying “Make Quiz” functional requirement
Chapter 4 Solutions
Database Systems: Design, Implementation, & Management
Ch. 4 - Prob. 1RQCh. 4 - What is a strong (or identifying) relationship,...Ch. 4 - Prob. 4RQCh. 4 - Suppose you are working within the framework of...Ch. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Discuss the difference between a composite key and...Ch. 4 - What two courses of action are available to a...Ch. 4 - Prob. 11RQCh. 4 - Discuss two ways in which the 1:M relationship...
Ch. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Briefly, but precisely, explain the difference...Ch. 4 - What are multivalued attributes, and how can they...Ch. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - What two attributes must be contained in the...Ch. 4 - Describe precisely the composition of the...Ch. 4 - Prob. 21RQCh. 4 - Prob. 1PCh. 4 - Create a complete ERD in Crows Foot notation that...Ch. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11C
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