Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 1.46PAE
Answer the following questions concerning Figures 1-18 and 1-19:
- What will be the field size for the ProductLineName field in the Product table? Why?
- In Figure 1-19 I, how is the ProductlD field in the Product table specified to be required? Why is it a required attribute?
- In Figure 1-19, explain the function of the FOREIGN KEY definition.
- In Figure 1-19, explain the purpose of the NOT NULL specification associated with ProductlD.
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Students have asked these similar questions
For each table, identify the primary key and the foreign key(s).
If a table does not have a foreign key, write None in the space
provided.
Do the tables exhibit entity integrity and referential integrity?
Answer yes or no and then explain your answer. In the case of
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does not have a foreign key.
iii. Describe the type(s) of relationship(s) between STORE and
REGION
Create the ERD to show the relationship between STORE and
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Describe the type(s) of relationship(s) between EMPLOYEE
and STORE. (Hint: Each store employs many employees, one of
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Consider two relations Order and Product with the schema Order (Oid, Odate, Pid, qty) and
Product (Pid, manufacturer_id, unit_price).
i) Can the Oid attribute in the relation Order be a candidate key of the relation? Justify
your answer.
ii) Can the Pid attribute in the relation Product be a candidate key of the relation? Justify your answer.
iii) Find the candidate key for the relation Product.
iv) Using the primary keys identified for the above relations write a SQL query that retrieves all tuples of the form (Oid, Odate, Pid, unit_price).
What is the most common method of specifying a primary key in a relational schema description?
Group of choice:
A. by enclosing the key attributes in parentheses
B. by stating the key attributes first in the relation definition
C. by writing key attributes in all capital letters
D. by italicizing the key attributes
E. by underlining the attributes that comprise the primary key
Chapter 1 Solutions
Modern Database Management
Ch. 1 - Prob. 1.1RQCh. 1 - Prob. 1.2RQCh. 1 - Prob. 1.3RQCh. 1 - Prob. 1.4RQCh. 1 - Prob. 1.5RQCh. 1 - Prob. 1.6RQCh. 1 - Prob. 1.7RQCh. 1 - How are relationships between tables expressed in...Ch. 1 - What does the term data independence mean, and why...Ch. 1 - Prob. 1.10RQ
Ch. 1 - Prob. 1.11RQCh. 1 - Prob. 1.12RQCh. 1 - Prob. 1.13RQCh. 1 - Prob. 1.14RQCh. 1 - Prob. 1.15RQCh. 1 - Prob. 1.16RQCh. 1 - Prob. 1.17RQCh. 1 - Prob. 1.18RQCh. 1 - Prob. 1.19RQCh. 1 - Prob. 1.20RQCh. 1 - Prob. 1.21RQCh. 1 - Prob. 1.22RQCh. 1 - Prob. 1.23RQCh. 1 - Prob. 1.24RQCh. 1 - Prob. 1.25RQCh. 1 - Prob. 1.26RQCh. 1 - Prob. 1.27PAECh. 1 - Prob. 1.28PAECh. 1 - Prob. 1.29PAECh. 1 - Prob. 1.30PAECh. 1 - Prob. 1.31PAECh. 1 - Prob. 1.32PAECh. 1 - Great Lakes Insurance would like to implement a...Ch. 1 - Figure 1-22 shows an enterprise data model for a...Ch. 1 - Prob. 1.35PAECh. 1 - Prob. 1.36PAECh. 1 - Prob. 1.37PAECh. 1 - Prob. 1.38PAECh. 1 - Prob. 1.39PAECh. 1 - Prob. 1.40PAECh. 1 - Prob. 1.41PAECh. 1 - Prob. 1.42PAECh. 1 - Prob. 1.43PAECh. 1 - Prob. 1.44PAECh. 1 - Consider the project data model shown in Figure...Ch. 1 - Answer the following questions concerning Figures...Ch. 1 - Prob. 1.47PAECh. 1 - Helen Jarvis wants to determine the most important...Ch. 1 - In this chapter, we described four important data...
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