Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 5, Problem 7P
Explanation of Solution
Crow’s Foot ER diagram for FlyRight Aircraft Maintenance division of the FlyRight Company:
The following data model shows the solution for the given question.
Explanation:
- In the above data model, the disjoint constraint (d) is used as a category symbol. Here the “Employee” supertype entity has optional subtypes. The primary of “Employee” entity is “Emp_No”...
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Instructions: Create a dimensional model for a particular business process involving
gym membership. A customer can sign up for a membership of say one, three, six or
twelve months. I want to make it easy to query to identify current members, members
who expired in the last month, members who renewed in the last month, those who are
pending expiry etc.
If I have a basic model with a fact table representing a gym membership say
start_date_key
end_date_key
membership_attribute_key
customer_atrribute_key
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with associated dimension table for date, membership attributes such as length,
customer attributes and so forth. On a particular day, the active members are those with
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Chapter 5 Solutions
Database Systems: Design, Implementation, & Management
Ch. 5 - Prob. 1RQCh. 5 - What kinds of data would you store in an entity...Ch. 5 - Prob. 3RQCh. 5 - What is a subtype discriminator? Give an example...Ch. 5 - Prob. 5RQCh. 5 - What is the difference between partial...Ch. 5 - Prob. 7RQCh. 5 - According to the data model, is it required that...Ch. 5 - Prob. 9RQCh. 5 - Prob. 10RQ
Ch. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - When implementing a 1:1 relationship, where should...Ch. 5 - What is time-variant data, and how would you deal...Ch. 5 - Prob. 16RQCh. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 8CCh. 5 - Prob. 9CCh. 5 - Prob. 10C
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