# Chapter 7 homework – normalization of relational tables

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

(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:   _______________________________