EBK DATABASE CONCEPTS
7th Edition
ISBN: 9780133777840
Author: AUER
Publisher: VST
expand_more
expand_more
format_list_bulleted
Concept explainers
Expert Solution & Answer
Chapter 4, Problem 4.25RQ
Explanation of Solution
Recursive relationship:
An entity which calls by itself more than once in different roles with a relationship are termed as a recursive relationship.
Example:
Consider the “Employee” can be in post of “Manager” and a “Manager” can manage an employee. So, “Manages” is relationship with “Employee” entity in recursive manner.
E-R diagram for the above example:
The following “E-R diagram” demonstrates an employee has a manager and the manager manages many employees.
Explanation:
Employee entity “1:M” relationship with “Manages” relationship which means an employee can be in the post of manager and a manager can manage many employees...
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Must be in JAVA. Please show in simplest form and with comments.
The correct UML Diagram MUST be provided as well with the solution. It will be flagged if the UML Diagram is not provided.
Create a diagram with one entity set, P erson, with one identifying
attribute, Name. For the P erson entity set create recursive
relationship sets, has mother, has father, and has children. Add
appropriate roles (i.e. mother, father, child, parent) to the recursive
refationship sets. (In an ER đíagram, we denote roſes by writing
the role name next to the connection between an entity set and a
relationship set. Be sure to specify the cardinalities of the
relationship
possibilities|a person has one mother, one father, and zero or
more children).
sets
appropriately according to biological
VER
Give two examples dialogue diagram with drawing using the three types of connection; sequence, iteration and selection.
Chapter 4 Solutions
EBK DATABASE CONCEPTS
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
Knowledge Booster
Learn more about
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
- Despite their usage, selection structures in computer programming have limits. Whether working with customers, online clients, or other transactions, the same approach must be followed. Are there different standards for different occupations? What's so great about these structures?arrow_forwardDiagrams 0 and 1 are notably different. It's crucial to clarify the distinction. Are there any symbols in the context diagram that aren't utilized at all?arrow_forwardDraw an ERD for the following situation (Batra et al., 1988). Also, develop the list of words for qualifiers and classes that you use to form attribute names. Explain whyarrow_forward
- Question 4 Explain the key generation process in AES algorithm with the aid of a diagram. Full explain this question and text typing work only thanksarrow_forwardThe relations from Exercise 3 are: a. (1,1), (1,3), (2,2), (3,1), (3,3) b. (1,2), (2,2), (3,2) c. (1,1), (1,2), (1,3), (2,1), (2,3), (3,1), (3,2), (3,3) There will be 3 directed graphs. One representing a, then b, then carrow_forwardOkay, let's have a look at a few of the programming paradigms out there. If that's the case, then why do we have so many different models? Why do we even need them if...? Use your own words to describe it.arrow_forward
- Descriptive models have certain important qualities and properties, which we will discuss here.arrow_forwardAlthough while selection structures play a crucial role in programming, they are not perfect. Any program that deals with a large number of users, whether they are consumers, online clients, or any other kind of transaction, has to use the same iterative approach. Do those working in these fields adhere to a code of conduct? What makes these structures unique in comparison to others?arrow_forwardDiagrams 0 and 1 are very dissimilar. It is essential to clarify the distinction. Exist in the Context diagram some symbols that are never employed?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill EducationStarting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSONDigital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
- C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSONDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningProgrammable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education