EBK DATABASE CONCEPTS
EBK DATABASE CONCEPTS
7th Edition
ISBN: 9780133544886
Author: AUER
Publisher: PEARSON CUSTOM PUB.(CONSIGNMENT)
Expert Solution & Answer
Book Icon
Chapter 2, Problem 2.40E

A)

Explanation of Solution

Table of example of students, one who has three siblings and other has two siblings:

StudentNumber StudentName SiblingName Major
10 Nick Jones

B)

Explanation of Solution

Candidate keys in the student relational table:

(StudentNumber,SiblingName) acts as candidate key for the Student Relational as using StudentNumber an...

C)

Explanation of Solution

Functional dependencies in the relation:

  • StudentNumber-> (StudentName, Major)
    • Here the composite attributes StudentName and Major are functionally dependent on the attribute StudentNumber.
    • The attribute StudentNumber determines the composite attribute StudentName and Major...

D)

Explanation of Solution

Well-formed relation:

The relations that do meet the relational design criteria are well-formed relations.

  • The relational Student table contains the functional dependencies: StudentNumber-> (StudentName, Major) and (StudentNumber, SiblingName) -> (StudentName, Major)...

E)

Explanation of Solution

4NF:

If in a relation there is no non-trivial multivalued dependency, other than a candidate key, the level of database normalization is in fourth normal form or 4NF.

4NF and set of well-formed relations:

A relational table is not a well formed relation if in the relation some attributes of the tuple are functionally dependent on a part of the composite primary key...

F)

Explanation of Solution

Divide the relation to form a set of well-formed relations:

Step-1: Break the student tuple into two relations: Student and StudentSibling.

Show the relations in each table:

STUDENT (StudentNumber, StudentName, Major) and STUDENT-SIBLING (StudentNumber, SiblingName)

  • For StudentSibling relation, show the functional dependencies among relations:
  • (StudentNumber, SiblingName) -> (StudentNumber)

Here, the attribute StudentNumber is functionally dependent on the composite attribute (StudentNumber, SiblingName).

The composite attribute (StudentNumber, SiblingName) determines the attribute StudentNumber.

(StudentNumber, SiblingName)->(SiblingName)

Here, the attribute SiblingName is functionally dependent on the composite attribute (StudentNumber, SiblingName).

The composite attribute (StudentNumber, SiblingName) determines the attribute StudentNumber.

Check the candidate keys for StudentSibling relation:

(StudentNumber,SiblingName) acts as a candidate key for the StudentSibling relation...

Students have asked these similar questions
Solve this
Solve this please and fast
Please original work Background information: Imagine you are a consultant for a fictional company, FutureTech Innovations, which specializes in advanced technology products. The company is interested in improving its decision-making processes by leveraging Business Analytics (BA) and Management Support Systems (MSS). Talk about how Online Analytical Processing (OLAP) could be used to analyze data from multiple perspectives at FutureTech. What dimensions (e.g., time, product, region) would be important, and how would OLAP enhance decision-making? Talk about the role of data visualization in helping FutureTech understand business performance. What types of visualizations (e.g., dashboards, charts) would be useful, and how would they assist in interpreting data? Please cite in text references and add weblinks
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Computer Networking: A Top-Down Approach (7th Edi...
Computer Engineering
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:PEARSON
Text book image
Computer Organization and Design MIPS Edition, Fi...
Computer Engineering
ISBN:9780124077263
Author:David A. Patterson, John L. Hennessy
Publisher:Elsevier Science
Text book image
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:9781337569330
Author:Jill West, Tamara Dean, Jean Andrews
Publisher:Cengage Learning
Text book image
Concepts of Database Management
Computer Engineering
ISBN:9781337093422
Author:Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:Cengage Learning
Text book image
Prelude to Programming
Computer Engineering
ISBN:9780133750423
Author:VENIT, Stewart
Publisher:Pearson Education
Text book image
Sc Business Data Communications and Networking, T...
Computer Engineering
ISBN:9781119368830
Author:FITZGERALD
Publisher:WILEY