Module/Week 5  Homework Assignment

Chapter 7 Homework

PART 1:   (1 point)

Given the following table, identify the functional dependencies:  

StdSSN	StdCity	StdClass	OfferNo	OffTerm	OffYear	EnrGrade	CourseNo	CrsDesc
S1	SEATTLE	JUN	01	SPRING	2009	3.5	C1	DB
S1	SEATTLE	JUN	02	FALL	2009	3.3	C2	VB
S2	DENVER	JUN	03	SPRING	2010	3.1	C3	OO
S2	DENVER	JUN	02	FALL	2009	3.4	C2	VB

 

 

 

 

 

 

 

 

 

 

 

 

PART 2: (1 point)

In the table provided below, fill in the following data such that it is completely un-normalized.  That is, it is not even in 1NF.

222-33-44444  John Doe         Web Design, Database, Intro to MIS, C# Programming

555-66-7777    Jane Doe         Prin. Of Accounting, Auditing I, Statistical Analysis

SSN	StudentName	Courses

 

PART 3: (1 point)

Using your un-normalized table above, fill in the table below with the data in 1NF.

SSN	StudentName	Courses

PART 4:

Given the following table and functional dependencies, construct tables below that will satisfy 2NF and identify the primary key of each new table. Note that the primary key of this table is StdSSN + OfferNo.

StdSSN	StdCity	StdClass	OfferNo	OffTerm	OffYear	EnrGrade	CourseNo	CrsDesc
S1	SEATTLE	JUN	01	SPRING	2009	3.5	C1	DB
S1	SEATTLE	JUN	02	FALL	2009	3.3	C2	VB
S2	DENVER	JUN	03	SPRING	2010	3.1	C3	OO
S2	DENVER	JUN	02	FALL	2009	3.4	C2	VB

 

Functional dependencies:

StdSSN à StdCity, StdClass

OfferNo à OffTerm, OffYear, CourseNo, CrsDesc

StdSSN, OfferNo à EnrGrade

(1/2 point)

Table 1 

Primary Key:      _______________________________ 

 

(1/2 point)

Table 2

Primary Key:        _______________________________   

(1/2 point)

Table 3

Primary Key:    _______________________________

 

PART 5:(1/2 point)

Now, assume an additional functional dependency:

CourseNo à CrsDesc

 

What table above needs to be modified to accommodate this new functional dependency?

_______________________________

 

 

PART 6:(1/2 point)

Given this new functional dependency, create tables below that will put this table in 3NF.

Table 4

Primary Key:   _______________________________

 

Table 5

Primary Key:    _______________________________

PART 7:(1/2 point)

Identify any foreign keys in Table 4:   _______________________________