What kinds of data would you store in an entity subtype? | bartleby

Database Systems: Design, Implemen...

13th Edition

Carlos Coronel + 1 other

Publisher: Cengage Learning

ISBN: 9781337627900

Chapter 5, Problem 2RQ

Textbook Problem

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What kinds of data would you store in an entity subtype?

Explanation of Solution

Entity Subtype:

Entity subtype is one type of entity which inherits the attributes from other entity.
The subtype relationship is a grouping of entities type in single entity that shares the common attributes or relationships which are different from other grouping.
It is related to an entity supertype, where the supertype entity has common characteristics and the subtype entity has the unique characteristics of each entity subtype.

Kind of data stored in entity subtype:

The entity subtype will store the data that is specific to the entity which means attributes that are unique the subtype.

Example:

The following example demonstrates the “supertype” entity, “subtype” entity, and “discriminator”...

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Chapter 5 Solutions

Database Systems: Design, Implementation, & Management

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Ch. 5 - What is an entity supertype, and why is it used?Ch. 5 - What kinds of data would you store in an entity...Ch. 5 - What is a specialization hierarchy?Ch. 5 - What is a subtype discriminator? Give an example...Ch. 5 - What is an overlapping subtype? Give an example.Ch. 5 - What is a disjoint subtype? Give an example.Ch. 5 - What is the difference between partial...Ch. 5 - List all of the attributes of a movie.Ch. 5 - According to the data model, is it required that...Ch. 5 - Is it possible for a book to appear in the BOOK...

Ch. 5 - What is an entity cluster, and what advantages are...Ch. 5 - What primary key characteristics are considered...Ch. 5 - Under what circumstances are composite primary...Ch. 5 - What is a surrogate primary key, and when would...Ch. 5 - When implementing a 1:1 relationship, where should...Ch. 5 - What is time-variant data, and how would you deal...Ch. 5 - What is the most common design trap, and how does...Ch. 5 - Given the following business scenario, create a...Ch. 5 - Given the following business scenario, create a...Ch. 5 - Given the following business scenario, create a...Ch. 5 - In Chapter 4, you saw the creation of the Tiny...Ch. 5 - Tiny College wants to keep track of the history of...Ch. 5 - Some Tiny College staff employees are information...Ch. 5 - The FlyRight Aircraft Maintenance (FRAM) division...Ch. 5 - Martial Arts R Us (MARU) needs a database. MARU is...Ch. 5 - The Journal of E-commerce Research Knowledge is a...Ch. 5 - Global Unified Technology Sales (GUTS) is moving...

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