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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

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

StdSSN- StdCity, StdClass

OfferNo     – OffTerm, OffYear, CourseNo, CrsDesc

CourseNo -CrsDesc

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

222-33-44444

Jane Doe

Web Design Database Intro to Mis C# Programming

555-666-7777

John Doe

Prin. OF Accounting Auditing I Statistical Analysis

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.

StdCity

StdClass

OffTerm

OffYear

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

(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:   _______________________________