Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 3.22PAE
Refer to the EER diagram for patients in Figure 3-3. Make any assumptions you believe are necessary. Develop sample definitions for each entity type, attribute, and relationship in the diagram.
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Analyze the given entity relationship diagram and answer the following questions.
What is the degree of “has” relationship?
Use the ER Diagram shown on Figure 2 to anewer questions 6 and 7:
6. According to the ER diagram on Figure 2, which of the following is true?
A) YearEnrolled is a derived attribute.
B) STUDENT entity has multiple unique attributes.
C) StudEmail is an optional attribute.
D) None of the above.
Answer:
7. According to the ER diagram on Figure 2, which of the following is true?
A) A student must attend a college but can only attend a single college.
B) Each college must have multiple students attending it.
C) NumOfStudents is a composite attribute.
D) None of the above.
Answer:
StudiD
CollD
StudName
STUDENT
Allends
COLLEGE
ColName
StudEmail
***
YearEnrolled (0)
NumOIStudents
Draw an Entity Relationship Diagram for ther following information.
Chapter 3 Solutions
Modern Database Management
Ch. 3 - Define each of the following terms: supertype...Ch. 3 - Match the following terms and definitions:...Ch. 3 - Contrast the following terms: supertype; subtype...Ch. 3 - State two conditions that indicate when a database...Ch. 3 - Prob. 3.5RQCh. 3 - Give an example (other than those discussed in the...Ch. 3 - What is the attribute inheritance? Why is it...Ch. 3 - Give an example of each of the following: a...Ch. 3 - What types of business rules are normally captured...Ch. 3 - What is the purpose of a subtype discriminator?
Ch. 3 - Prob. 3.11RQCh. 3 - In what ways is starting a data modeling project...Ch. 3 - Prob. 3.13RQCh. 3 - Prob. 3.14RQCh. 3 - What do you purchase when you acquire a packaged...Ch. 3 - In Figure 3-5b, why must the minimum cardinality...Ch. 3 - When is a member of a supertype always a member of...Ch. 3 - Examine the hierarchy for the university EER...Ch. 3 - Add a subtype discriminator for each of the...Ch. 3 - For simplicity, subtype discriminators were left...Ch. 3 - Refer to the employee EER diagram in Figure 3-2....Ch. 3 - Refer to the EER diagram for patients in Figure...Ch. 3 - Figure 3-13 shows the development Of entity...Ch. 3 - Refer to Problem and Exercise 2-44 in Chapter 2...Ch. 3 - For a library, the entity type HOLDING has four...Ch. 3 - A bank has three types of accounts: checking,...Ch. 3 - Refer to your answer to Problem and Exercise 2-4...Ch. 3 - Refer to your answer to Problem and Exercise 3-24...Ch. 3 - Prob. 3.29PAECh. 3 - Draw an EER diagram for the following situation:...Ch. 3 - Develop an EER model for the following situation,...Ch. 3 - Prob. 3.32PAECh. 3 - Prob. 3.33PAECh. 3 - Prob. 3.34PAECh. 3 - Based on the EER diagram constructed for Problem...Ch. 3 - Prob. 3.36PAECh. 3 - Prob. 3.37PAECh. 3 - Add the following to Figure 3-16: An EMPLOYMENT...
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- Please draw the ER diagram. Explain how you know which one is entity, attribute, and all constraints. Explain each step of the diagram.arrow_forwardWrite down the various types of characteristics in the Entity-Relationship (ER) model.arrow_forwardList the Entity-Relationship (ER) model's various characteristics.arrow_forward
- Using the ERD diagram above, identify an attribute that might represent a Derived Attribute. Once you identify, explain why this is so. Is this the only attribute? Are there others?arrow_forwardFor the entity-relationship model expressed in the IE diagram below, what is the minimum number of tables required to implement it in BCNF. (Image attached). Enter the number below.arrow_forwardModify the Er diagram given below and add 5 to 6 more additions to it such as entities attributes relationships etcarrow_forward
- describe each diagram.arrow_forwardDRAW AN ER DIAGRAM , Create a many-to-many unary relationship. Include at least one of each type of attribute (composite, multivalued, and derived). Be sure to use an associative entity, no identifier.arrow_forwardDraw an E-R diagram for a bank. It should include at least customers, checking accounts and loans, and appropriate relationships between them. Note: To keep this to a resonable size, you should limit yourself to at most six entities and at most eight attributes per entity.arrow_forward
- Make a UML diagram, Entity Relationship Model with the following data from the tablearrow_forwardQI/ Draw ER diagram representing entity sets and relationship set described below, also determine the cardinality of the relationship: Entities: Employees(SSN. name, title) . Departments (D_ID. name, budget) Relationship: Work_in(since) Note: the atiributes of each entity or relationship are between the parenthesis of them.arrow_forwardDraw an entity-relationship diagram for the following situation:Many students play many different sports. One person, called the head coach, assumes the role of coaching all these sports. Each of the entities has a number and a name. (Make any assumptions necessary to complete a reasonable diagram. List your assumptions.)arrow_forward
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Enhanced Entity Relationship Model; Author: Data Science Center;https://www.youtube.com/watch?v=ocQUtXPumdQ;License: Standard YouTube License, CC-BY