Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 19RQ
What two attributes must be contained in the composite entity between STORE and PRODUCT? Use proper terminology in your answer.
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Given the ER diagram above, answer the following questions:
a. Name an entity type that has more than 2 relationships.
b. Name one ket attribute and the entity type it belongs to.
c. Name one one-to-one relationship and the entity types it relates.
d. Name one many-to-many relationship and its entity types.
e. Name one relationship attribute.
f. What is the cardinality of relationship ‘employs’?
g. What is the cardinality of relationship ‘textUsed’?
h. Name one weak entity type
i. Does it have a partial key? If yes, name it. ii. Name its identifying entity type
iii. Name its identifying relationship
Question 2 A bank provides services to customers. The banks is identified by its code and has a name and an address. The bank has several branches. A branch is identified by its code that is unique for a given bank. The branch name and address are also stored in the database.
Customers deal with the bank through the bank branches. So, a customer belongs to a specific bank branch. Customers…
The course I'm taking is database management.
I have attached the question. Please provide solution in detail so i can better understand why. Thank you in Advance!
please answer with proper explanation and step by step solution.
Chapter 4 Solutions
Database Systems: Design, Implementation, & Management
Ch. 4 - Prob. 1RQCh. 4 - What is a strong (or identifying) relationship,...Ch. 4 - Prob. 4RQCh. 4 - Suppose you are working within the framework of...Ch. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Discuss the difference between a composite key and...Ch. 4 - What two courses of action are available to a...Ch. 4 - Prob. 11RQCh. 4 - Discuss two ways in which the 1:M relationship...
Ch. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Briefly, but precisely, explain the difference...Ch. 4 - What are multivalued attributes, and how can they...Ch. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - What two attributes must be contained in the...Ch. 4 - Describe precisely the composition of the...Ch. 4 - Prob. 21RQCh. 4 - Prob. 1PCh. 4 - Create a complete ERD in Crows Foot notation that...Ch. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11C
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- What is the attribute that could be obtained using other attributes in the Entity-Relationship Diagram? Select one: a.Multi-Valued Attribute b.Derived / Calculates Attribute c.Single-Valued Attribute d.Composite Attributearrow_forwardIn an entity-relationship diagram, what does cardinality mean? 1:The data is saved concerning a single, individually identified element. 2:In a connection, the maximum number of entity instances 3:An entity's total number of primary keys 4:An entity's total amount of characteristicsarrow_forwardThe question is in the image below.arrow_forward
- 1. List down the types of attributes in the Entity-Relationship (ER) model.arrow_forwardTelephone DVD Number Code Member Cost Name Tle Date Out Date In Number (RM) 1012 Inobel Ringer 293847 003 American Ple 2.50 1 Jan 2014 2 Jan 2014 011 My Grandpa in My Pocket 2.00 2 Jan 2014 3 Jan 2014 1034 John Siver 142536 002 Finding Nemo 3.50 17 Feb 2014 18 Feb 2014 015 Shrek 4.00 28 Feb 2014 1 March 2014 1056 Fred Flinstone 817263 003 American Pie 2.50 3 March 2014 4 March 2014 011 My Grandpa in My Pocket 2.00 13 March 2014 14 March 2014 1097 Annette Kirton 384756 008 Frozen 4.00 2 April 2014 3 April 2014 014 Prime Suspect 2.00 3 April 2014 4 April 2014arrow_forwardThe cardinality ratio depends on the real-world meaning of the entity types involved and is defined by the specific application. For the binary relationships below, suggest cardinality ratios based on common-sense meaning of the entity types. Clearly state any assumptions you make. Entity 1 Student Cardinality Ratio Entity 2 Course Item Class Teacher TextBook wwwwwwwwwww Order Instructorarrow_forward
- The entity type STUDENT has the following attributes: Student Name, Address, Phone, Age, Activity, and No of Years. Activity represents some campus-based student activity, and No of Years represents the number of years the student has engaged in this activity. A given student may engage in more than one activity. Draw an ERD for this situation. What attribute or attributes did you designate as the identifier for the STUDENT entity? Why?arrow_forwardQuestion 1 Given the ER diagram above, answer the following questions: Name an entity type that has more than 2 relationships. Name one ket attribute and the entity type it belongs to. Name one one-to-one relationship and the entity types it relates. Name one many-to-many relationship and its entity types. Name one relationship attribute. What is the cardinality of relationship ‘employs’? What is the cardinality of relationship ‘textUsed’? Name one weak entity type Does it have a partial key? If yes, name it. Name its identifying entity type Name its identifying relationshiparrow_forward1. What are multivalued attributes. 2. What's the difference between partial completeness and total completeness 3. What are the two conditions that must be met before an entity is classified as weak entity.arrow_forward
- Suppose that we have to create a database for a car dealership. Identify 2 entities How the entities you identified are related? write the business rule create the crow's foot diagram as well as the Chen model diagram.arrow_forwardIn an entity-relationship diagram, what does cardinality represent? 1:The distinct identifier for which data is kept 2:The relationship's maximum number of entity instances 3:An entity's total amount of primary keys. 4:An entity's total amount of characteristicsarrow_forwardIn a few words, describe the logical link between the entities entity, attribute, and relationship.arrow_forward
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