Docsity
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Docsity AI
Docsity AI
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

Computer Software, Code learning, Assigment, Assignments of Mathematics

FPT University (FPTU)Mathematics

Some Files you need to improve your skills code and point in class

Typology: Assignments

2019/2020

Uploaded on 09/23/2020

hnhoangdz
hnhoangdz 🇻🇳

5

(9)

3 documents

1 / 2

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Regional Labs is a company that conducts research and development work on a contract
basis for other companies and organizations. Figure below shows data that Regional Labs
collects about projects and the employees assigned to them. This data is stored in a relation
(table) named PROJECT:
ProjectI
D
EmployeeNa
me
EmployeeSal
ary
100-A Eric Jones 64,000.00
100-A Donna Smith 70,000.00
100-B Donna Smith 70,000.00
200-A Eric Jones 64,000.00
200-B Eric Jones 64,000.00
200-C Eric Parks 58,000.00
200-C Donna Smith 70,000.00
200-D Eric Parks 58,000.00
A. Assuming that all functional dependencies are apparent in this data, which of the
following are true?
1. ProjectID -> EmployeeName
2. ProjectID -> EmployeeSalary
3. (ProjectID, EmployeeName) -> EmployeeSalary
4. EmployeeName -> EmployeeSalary
5. EmployeeSalary -> ProjectID
6. EmployeeSalary -> (ProjectID, EmployeeName)
B. What is the primary key of PROJECT?
pf2

Partial preview of the text

Download Computer Software, Code learning, Assigment and more Assignments Mathematics in PDF only on Docsity!

Regional Labs is a company that conducts research and development work on a contract basis for other companies and organizations. Figure below shows data that Regional Labs collects about projects and the employees assigned to them. This data is stored in a relation (table) named PROJECT: ProjectI D EmployeeNa me EmployeeSal ary 100-A Eric Jones 64,000. 100-A Donna Smith 70,000. 100-B Donna Smith 70,000. 200-A Eric Jones 64,000. 200-B Eric Jones 64,000. 200-C Eric Parks 58,000. 200-C Donna Smith 70,000. 200-D Eric Parks 58,000. A. Assuming that all functional dependencies are apparent in this data, which of the following are true?

  1. ProjectID - > EmployeeName
  2. ProjectID -> EmployeeSalary
  3. (ProjectID, EmployeeName) -> EmployeeSalary
  4. EmployeeName -> EmployeeSalary
  5. EmployeeSalary -> ProjectID
  6. EmployeeSalary -> (ProjectID, EmployeeName) B. What is the primary key of PROJECT?

C. Are all the non-key attributes (if any) dependent on the primary key? D. In what normal form is PROJECT? E. Describe two modification anomalies that affect PROJECT. F. Is ProjectID a determinant? If so, based on which functional dependencies in part A? G. Is EmployeeName a determinant? If so, based on which functional dependencies in part A? H. Is (ProjectID, EmployeeName) a determinant? If so, based on which functional depen- dencies in part A? I. Is EmployeeSalary a determinant? If so, based on which functional dependencies in part A? J. Does this relation contain a transitive dependency? If so, what is it? K. Redesign the relation to eliminate modification anomalies.