This question is based on the following relation and sample data, where Employee Social Security Number is the Primary Key: Employee Social Security Number Employee Family Name Department Number Department Name Department Extension 123 Smith 5 Research 2800 333 Wong 5 Research 2800 999 Zelaya 4 Admin 2801 987 Wallace 4 Admin 2801 888 Borg 1 HQ 2799 Identify the direct functional dependencies in the relation above. You should assume the sample data is representative. In what normal form is the relation? You must justify your answer by explaining why the relation is in the normal form you are claiming. Using the relation above, give an example of a deletion anomaly that may occur. Convert the relation into a set of relations in at least Third Normal Form, clearly indicating the primary and foreign keys
This question is based on the following relation and sample data, where Employee Social Security Number is the Primary Key: Employee Social Security Number Employee Family Name Department Number Department Name Department Extension 123 Smith 5 Research 2800 333 Wong 5 Research 2800 999 Zelaya 4 Admin 2801 987 Wallace 4 Admin 2801 888 Borg 1 HQ 2799 Identify the direct functional dependencies in the relation above. You should assume the sample data is representative. In what normal form is the relation? You must justify your answer by explaining why the relation is in the normal form you are claiming. Using the relation above, give an example of a deletion anomaly that may occur. Convert the relation into a set of relations in at least Third Normal Form, clearly indicating the primary and foreign keys
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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This question is based on the following relation and sample data, where Employee Social Security Number is the Primary Key:
Employee Social Security Number |
Employee Family Name |
Department Number |
Department Name |
Department Extension |
123 |
Smith |
5 |
Research |
2800 |
333 |
Wong |
5 |
Research |
2800 |
999 |
Zelaya |
4 |
Admin |
2801 |
987 |
Wallace |
4 |
Admin |
2801 |
888 |
Borg |
1 |
HQ |
2799 |
- Identify the direct functional dependencies in the relation above. You should assume the sample data is representative.
- In what normal form is the relation? You must justify your answer by explaining why the relation is in the normal form you are claiming.
- Using the relation above, give an example of a deletion anomaly that may occur.
Convert the relation into a set of relations in at least Third Normal Form, clearly indicating the primary and foreign keys
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