Basics of Functional Dependency

Basics of Functional Dependency: Name: Chrystelle Song                       Date: 07/05/2015

Week 5 – Assignment #5: Chapters 15-16                                                    Grade: 5% of Class Grade


#15.19 – Suppose we have the following requirements (all five) for a university database that is used to keep track of students’ transcripts:

(a)     The university keeps track of each student’s name (SNAME), student number (SNUM), social security number (SSSN), current address (SCADDR) and phone (SCPHONE), permanent address (SPADDR) and phone (SPPHONE), birthdate (BDATE), sex (SEX), class (CLASS) (freshman, sophomore, …, graduate), major department (MAJORDEPTCODE), minor department (MINORDEPTCODE) (if any), and degree program (PROG) (B.A., B.S., …, Ph.D.). Both ssn and student number have unique values for each student.

(b)     Each department is described by a name (DEPTNAME), department code (DEPTCODE), office number (DEPTOFFICE), office phone (DEPTPHONE), and college (DEPTCOLLEGE). Both name and code have unique values for each department.

(c)     Each course has a course name (CNAME), description (CDESC), code number (CNUM), number of semester hours (CREDIT), level (LEVEL), and offering department (CDEPT). The value of code number is unique for each course.

(d)     Each section has an instructor (INSTUCTORNAME), semester (SEMESTER), year (YEAR), course (SECCOURSE), and section number (SECNUM). Section numbers distinguish different sections of the same course that are taught during the same semester/year; its values are 1, 2, 3, …; up to the number of sections taught during each semester.

(e)     A grade record refers to a student (Ssn), refers to a particular section, and grade (GRADE).

Design a relational database schema for this database application. First show all the functional dependencies that should hold among the attributes. Then, design relation schemas for the database that are each in 3NF or BCNF. Specify the key attributes of each relation. Note any unspecified requirements, and make appropriate assumptions to make the specification complete.

#15.20 – What update anomalies occur in the EMP_PROJ and EMP_DEPT relations of Figure 15.3 and 15.4?



#15.21 – In what normal form is the LOTS relation schema in Figure 15.12(a) with respect to the restrictive interpretations of normal form that take only the primary key into account? Would it be in the same normal form if the general definitions of normal form were used?


#15.35 – Consider the relation:

        BOOK (Book_Name, Author, Edition, Year) with the data:

Book_Name Author Edition Year
DB_fundamentals Navathe 4 2004
DB_fundamentals Elmasri 4 2004
DB_fundamentals Elmasri 5 2007
DB_fundamentals Navathe 5 2007


a.        Based on a common-sense understanding of the above data, what are the possible candidate keys of this relation?

b.       Does the above have one or more functional dependency (do not list FDs by applying derivation rules)? If so, what is it? Show how you will remove it by decomposition.

c.        Does the resulting relation have an MVD? If so, what is it?

d.       What will the final decomposition look like?



#16.20 – Show that the relation schemas produced by Algorithm 16.6 are in 3NF.


#16.21 – Specify a template dependency for join dependencies.

#16.22 – Specify all the inclusion dependencies for the relational schema of Figure 3.5.


Get 20% Discount on This Paper
Pages (550 words)
Approximate price: -

Try it now!

Get 20% Discount on This Paper

We'll send you the first draft for approval by at
Total price:

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

Australia Assessments has gained an international reputation of being the leading website in custom assignment writing services. Once you give us the instructions of your paper through the order form, we will complete the rest.


Essay Writing Services

As we work towards providing the best custom assignment services, our company provides assignment services for any type of academic essay. We will help you develop professionally written essays that are rich in content and free from plagiarism.


Admission and Business Papers

Our skilled team of professional writers will ensure that we help you craft a remarkable admission essay for your desired Master's program in your institution of choice. We won't stop there. Once you enter the job market, we will be available to secure you a position at your desired worksite by creating an outstanding portfolio or resume.


Editing and Proofreading

Our editorial team is always available for all editing and proofreading services. They check completed papers by our writers and also provide professional opinions to papers completed by our clients.


Technical papers

We harbor professional academic writers with different qualifications in diverse academic fields. As such, we are capable of handling both simple and technical papers. Ensure that you provide us with correct and complete instructions in the order form.