Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Question
Chapter 2, Problem 15P
Program Plan Intro
The Crow’s Foot ERD for the relationship between PUBLISHER, BOOK, CONTRACT, and AUTHOR is given below. In the given model, the connectivity’s “1” is represented by a short line segment, and “M” is represented by the three-pronged crow’s foot and the relationship name “publishes”, “writes”, “signs” and “submits” is written above the relationship line.
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Write the business rules that are reflected in the ERD shown in Figure P2.15. (Note that the ERD reflects some simplifying assumptions. For example, each book is written by only one author. Also, remember that the ERD is always read from the “1” to the “M” side, regardless of the orientation of the ERD components.)
FIGURE P2.15 THE CROW’S FOOT ERD FOR PROBLEM 15
Build an entity-relationship diagram, deriving relations and validating relations using normalization up to third normal form
What's the difference between weak and strong entity sets?
Chapter 2 Solutions
Database Systems: Design, Implementation, & Management
Ch. 2 - Prob. 1RQCh. 2 - What is a business rule, and what is its purpose...Ch. 2 - How do you translate business rules into data...Ch. 2 - Prob. 4RQCh. 2 - Explain how the entity relationship (ER) model...Ch. 2 - Prob. 6RQCh. 2 - Prob. 7RQCh. 2 - Prob. 8RQCh. 2 - Prob. 9RQCh. 2 - Prob. 10RQ
Ch. 2 - What is a relationship, and what three types of...Ch. 2 - Give an example of each of the three types of...Ch. 2 - What is a table, and what role does it play in the...Ch. 2 - Prob. 14RQCh. 2 - Prob. 15RQCh. 2 - Prob. 16RQCh. 2 - Prob. 17RQCh. 2 - Prob. 18RQCh. 2 - Prob. 19RQCh. 2 - Prob. 20RQCh. 2 - Prob. 21RQCh. 2 - Prob. 22RQCh. 2 - Prob. 23RQCh. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Using Figure P2.6 as your guide, work Problems 68....Ch. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Typically, a hospital patient receives medications...Ch. 2 - Prob. 10PCh. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 16PCh. 2 - Prob. 17P
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- What does it mean to be a weak entity? Give an illustration.arrow_forwardModify the Er diagram given below and add 5 to 6 more additions to it such as entities attributes relationships etcarrow_forwardConsider the following ER diagram given to you what are the possible relations you will be creating inRelational model.arrow_forward
- For each consistency error in Figure 1, you should identify the consistency rule violated and suggest possible resolutions of the error. The ERD has generic names to help will concentrate on finding diagram errors rather than focusing on the meaning of the diagramarrow_forwardwhich rules apply to desigining table with less redundancy? a) Binary Relationship b) Reflective Relationship c) Weak entity d) Normal formarrow_forwardCreate an entity-relationship diagram for the three entities showing the correct cardinalities. Save and print a copy.arrow_forward
- Discuss how traceability relations are classified, elicit a brief example that defines the classification context, and draw a diagram if necessary.arrow_forwardDraw a dependency diagram for the graphic below.arrow_forwardDraw the Crow's Foot ERD to reflect the dependency diagrams below.arrow_forward
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