assignment

User Generated

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Writing

Description

CMIS 320 Project 4

Examine the following relation and its attributes and answer the following questions. Assume these are the values for “all time”. Assume girls with the same name are the same person.

GIRL

GROUP

AGE

GAME

CATEGORY

PRICE

Charlotte

page1image5045248

5 year olds

5

page1image2977888

Mirror

Makeup

4.88

Susan

page1image5036064

6 year olds

6

page1image5036176

Lipstick

Makeup

5.95

Jane

5 year olds

5

Chess

Games

7.55

Susan

6 year olds

6

Checkers

Games

5.95

Susan

6 year olds

6

Mirror

Makeup

4.88

Carrie

6 year olds

6

Lipstick

Makeup

5.95

Jacqueline

page1image2979232

5 year olds

5

page1image5045696

Visual Basic

Prog. Languages

199.99

1) Is this relation in at least 1NF? Why or why not?

2) What is the primary key of the initial relation (assume the values shown are the only possible tuples for all time)? Remember that a primary key must be unique and not null.

3) Describe the specific data anomalies that exist if we DELETE the tuple containing Jacqueline.

4) Draw a functional dependency diagram for the initial relation. This diagram should agree with the primary key you selected in above.

5) Based on your diagram, what normal form is the initial relation in? Why?

6) If necessary, decompose the initial relation into a set of non-loss 3NF relations by showing the relations, attributes, and tuples. Show complete relations with attribute headings and all data values in the tuples of your relations. Determine the number of 3NF relations you end up with after normalization, write this number, and then circle the number.

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page1image3790656

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page1image3790240

page1image3790032

page1image3789824

page1image3789616

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Grading rubric

Attributes

Meets

Does Not Meet

Normal form

20 points

Student correctly identifies normal form of initial relation

0 points

Major error in identification of normal form or not specified

Primary key

25 points

Student correctly identified primary key of initial relation

0 points

Major error with identification of primary key or not specified

Data anomalies

15 points

Student correctly describes data anomalies

0 points

Major errors with description of data anomalies or not specified

Functional dependency diagram

15 points

Student correctly develops functional dependency diagram of initial relation

0 points

Major errors developing functional dependency diagram or not specified

Normalized 3NF relations

page2image5013888 page2image5014224

25 points

Student correctly develops the proper set of 3NF relations via normalization

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Explanation & Answer

Hey am done. Attached are the correct answers

Running head: NORMALIZATION

1

Normalization
Author
Date
Professors Name

NORMALIZATION

2

Question 1
Is this relation in at least 1NF? Why or why not?
The table relation is in 1NF since the table shows data in rows and column where the first
column can act as the primary key by uniquely identifying each row. Each of the columns in the
table has atomic values and there exist no repeating groups of columns.
Question 2
What is the primary key of the initial relation (assume the values shown are the only
possible tuples for all time)? Remember that a primary key must be unique and not null.
Typically, the primary key for the table comprise of fields with values that are unique
throughout the table i.e....


Anonymous
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