Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Chapter 4, Problem 9P
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Entity ER Diagram:
The following figure illustrates the ER Diagram for given business rules in Crow’s Foot notation:
Explanation:
The above Professional Electronics and Repairs (PEAR) ERD contains entities such as “CUSTOMER”, “REPAIR”, “DEVICE”, “PERFORM”, “SERVICE”, “PART” and “USES”.
- The relationship between the “CUSTOMER” and “REPAIR” entities is 1: M...
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SportTech Events.
SportTech Events SportTech Events puts on athletic events for local high school athletes. The company needs a database designed to keep track of the sponsor for the event and where the event is located. Each event needs a description, date, and cost. Separate costs are negotiated for each event. The company would also like to have a list of potential sponsors that includes each sponsor’s contact information, such as the name, phone number, and address. Each event will have a single sponsor, but a particular sponsor may sponsor more than one event. Each location will need an ID, a contact person, and a phone number. A particular event will use only one location, but a location may be used for multiple events. SportTech asks you to create a Conceptual Entity Relationship Diagram from the information described above.
ER Design Exercise
as a database you need to ensure that each excercise log has a unique ID number, date, excercise category, excercise subcategory, time spent, calories burnt . each customer has unique cust_number and their first name, last name, address, program number, program tile and payment must be recorder. every program has a program number(PNum) that uniquely identifies the program. the program title, startDate, FinishDate, price must also be recorder. each coach has unique Id number. their first name, last name, date of birth, address, contactNo, username and password must be recorder. A coach can work on only one program. A program can have one or more coaches associate with it. one customer can enroll for one program at a time. normalize the above database in 3NF. State for every step in normalization which functional dependency cause it. identify different type of anomalies which can be found in a database. how can we overcome them ?
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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