UMGC Relation in At Least 1 Nf Programing Questions

CMIS 320 Project 4Examine 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
Charlotte
Susan
Jane
Susan
Susan
Carrie
Jacqueline
GROUP
5 year olds
6 year olds
5 year olds
6 year olds
6 year olds
6 year olds
5 year olds
AGE
5
6
5
6
6
6
5
GAME
Mirror
Lipstick
Chess
Checkers
Mirror
Lipstick
Visual Basic
CATEGORY
Makeup
Makeup
Games
Games
Makeup
Makeup
Prog. Languages
PRICE
4.88
5.95
7.55
5.95
4.88
5.95
199.99
For each question below, please be sure to review the course content for additional reference
material.
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. This can be drawn in any drawing tool. Be
sure to identify dependencies like full, partial, transient, etc. between the attributes.
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.
Additional References:
•
•
•
•
What is Normalization? https://www.guru99.com/database-normalization.html
What is a Primary Key? https://www.techopedia.com/definition/5547/primary-key
What are data anomalies? https://databasemanagement.fandom.com/wiki/Data_Anomalies
The Third Normal Form. https://www.geeksforgeeks.org/third-normal-form-3nf/
Assignment-4’s grading rubric:
Attributes
Meets
Does Not Meet
Normal form
45 points
0 points
Student correctly identifies normal form Major error in identification of normal
of initial relation.
form or not specified.
Primary key
60 points
0 points
Student correctly identified primary key Major error with identification of primary
of initial relation.
key or not specified.
Data anomalies
30 points
Student correctly describes data
anomalies.
0 points
Major errors with description of data
anomalies or not specified.
Functional dependency
diagram
30 points
Student correctly develops functional.
dependency diagram of initial relation.
0 points
Major errors developing functional
dependency diagram or not specified.
60 points
Normalized 3NF relations Student correctly develops the proper
set of 3NF relations via normalization.
0 points
Major errors in development of proper
set of 3NF relations or not specified.