Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
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Chapter 4, Problem 4.7RQ
Define the term entity, and give an example other than those used in this book.
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Chapter 4 Solutions
Database Concepts (8th Edition)
Ch. 4 - Prob. 4.1RQCh. 4 - Prob. 4.2RQCh. 4 - Prob. 4.3RQCh. 4 - What is a use case, and what is its purpose?Ch. 4 - Give an example of a data constraint.Ch. 4 - Prob. 4.6RQCh. 4 - Define the term entity, and give an example other...Ch. 4 - Explain the difference between an entity class and...Ch. 4 - Define the term attribute, and give examples for...Ch. 4 - Define the term identifier, and indicate which...
Ch. 4 - Prob. 4.11RQCh. 4 - Prob. 4.12RQCh. 4 - Prob. 4.13RQCh. 4 - Prob. 4.14RQCh. 4 - List and give an example of the three types of...Ch. 4 - Prob. 4.16RQCh. 4 - Prob. 4.17RQCh. 4 - Prob. 4.18RQCh. 4 - Define the term weak entity, and give an example...Ch. 4 - Explain the ambiguity in the definition of the...Ch. 4 - Define the term associative entity, and give an...Ch. 4 - Define the terms supertype, subtype, and...Ch. 4 - What is an exclusive subtype relationship? Give an...Ch. 4 - What is an inclusive subtype relationship? Give an...Ch. 4 - Prob. 4.25RQCh. 4 - Prob. 4.26RQCh. 4 - Prob. 4.27RQCh. 4 - Prob. 4.28RQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Define Key Attribute with an example.arrow_forwardEntity, relationship, and attribute names and definitions should all be correct.arrow_forwardPlease help with the following: What concept is defined by the following definition? ”A set of entities of the same type that share the same properties and attributes.” Select one: a. All of the above b. Relation c. Entity set d. Relationship setarrow_forward
- For each of the below relationships, provide an explanation of what it is and a relevant example.One-to-many relationship. Many-to-many relationship. One-to-one relationship.arrow_forwardSuppose that we wish to keep a genealogy. The information we wish to record about each person includes their name, date of birth, phone number, and degrees obtained . We also need to keep track of the mother, father, and children of each person. Draw a complete Entity-Relationship diagram. You must include all the details, sad as keys, weak entities (if any), cardinality constraints, etc. Your diagram must avoid redundancy.arrow_forwardGive an example of each of the following, other than those described in this chapter, and clearly explain why your example is this type of relationship and not of some other degree.a. ternary relationshipb. unary relationshiparrow_forward
- Using the relations ATTACHED, normalize your relations into first, second, and third normal forms. First, KINDLY describe the changes required to your relations to meet the standard of the first 1NF and then 2NF and lastly 3NF. Then, you should provide an Entity Relationship diagram that is in 3NF. All attributes, entities, keys, and relationships should be included and labelled. Hint: Remember that in the hospital software system, the “Patient” relation includes the “medicines” attribute and the “Appointment” relation includes the “allergies” attribute. Allergies describe a list of any known allergies and medicines describe a list of medicines prescribed for a patient. Please add: Define or describe the changes required to get the relations into the 1st normal form. Define or describe the changes required to get the relations into the 2nd normal form. Include an Entity Relationship diagram in the 3rd normal form. The primary and foreign keys, at a minimum, are defined for each…arrow_forwardWhat does the term "relationship" mean? What are the qualities of a relation defined as?arrow_forwardDraw the associations that are described by the following business rules. Include the multiplicities for each relationship. (4 marks) A patient must be assigned to only one doctor, and a doctor can have one or many patient: An employee has one phone extension, and a unique phone extension is assigned to an employee. A bookstore sells at least one book, and a book can be sold at up to 10 other bookstores around town.arrow_forward
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