PRINCIPLES OF INFO.SYS.(LL)>CUSTOM PKG<
12th Edition
ISBN: 9781337074674
Author: STAIR
Publisher: CENGAGE C
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Chapter 5, Problem 5RQ
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Entity Relationship model:
Entity relationship model is also called as Entity relationship diagram that is basically a picture or snapshot about the business system. It represents the abstract of data modeling representation.
- Entities may represent the physical object, event, or concept.
- An attribute is a property of an entity.
- Relationship denotes the link between the entities.
- If an independent child entity is present in a relationship then it is called a non-identifying relationship.
- If a dependent child entity is present in a relationship then it is called a non-identifying relationship.
Purpose of ER model:
The entity relationship diagram is used to represent the working procedure of organization or business system and shows the relationship among them.
Example of Entity relationship model:
A Patient must be assigned to only one doctor, and a doctor can have many patients:
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What exactly are entity-relationship diagrams, and how do they come into play? What kind of symbol is utilized to represent a relationship? What is an associative entity, and how does it work? Give an illustration of your point.
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How does entity-relationship modeling work, and what are its key components?
Chapter 5 Solutions
PRINCIPLES OF INFO.SYS.(LL)>CUSTOM PKG<
Ch. 5.6 - Prob. 1DQCh. 5.6 - Prob. 2DQCh. 5.6 - Prob. 1CTQCh. 5.6 - Prob. 2CTQCh. 5.7 - Prob. 1DQCh. 5.7 - Prob. 2DQCh. 5.7 - Prob. 1CTQCh. 5.7 - Prob. 2CTQCh. 5 - Prob. 1SATCh. 5 - Prob. 2SAT
Ch. 5 - Prob. 3SATCh. 5 - Prob. 4SATCh. 5 - Prob. 5SATCh. 5 - Prob. 6SATCh. 5 - Prob. 7SATCh. 5 - Prob. 8SATCh. 5 - ______ is a special-purpose programming language...Ch. 5 - Prob. 10SATCh. 5 - Prob. 11SATCh. 5 - Prob. 12SATCh. 5 - Prob. 13SATCh. 5 - Prob. 14SATCh. 5 - An in-memory database (IMDB) is a database...Ch. 5 - Prob. 16SATCh. 5 - Prob. 17SATCh. 5 - Prob. 18SATCh. 5 - Prob. 19SATCh. 5 - Prob. 20SATCh. 5 - Prob. 1RQCh. 5 - What is the difference between a data attribute...Ch. 5 - Prob. 3RQCh. 5 - Prob. 4RQCh. 5 - Prob. 5RQCh. 5 - Prob. 6RQCh. 5 - Prob. 7RQCh. 5 - Prob. 8RQCh. 5 - Prob. 9RQCh. 5 - Prob. 10RQCh. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - Prob. 15RQCh. 5 - Prob. 16RQCh. 5 - Prob. 17RQCh. 5 - Prob. 18RQCh. 5 - What is data mining? What is OLAP? How are they...Ch. 5 - Prob. 20RQCh. 5 - Prob. 21RQCh. 5 - Prob. 1DQCh. 5 - Outline some specific steps an organization might...Ch. 5 - Briefly describe the ACID properties to which an...Ch. 5 - Prob. 4DQCh. 5 - Prob. 5DQCh. 5 - Prob. 6DQCh. 5 - Prob. 7DQCh. 5 - Prob. 8DQCh. 5 - Prob. 9DQCh. 5 - Prob. 10DQCh. 5 - Prob. 11DQCh. 5 - Prob. 12DQCh. 5 - Prob. 13DQCh. 5 - Prob. 1PSECh. 5 - An online video movie rental store is using a...Ch. 5 - Using a graphics program, develop an...Ch. 5 - Prob. 1WECh. 5 - Prob. 1CECh. 5 - Prob. 2CECh. 5 - Prob. 1DQ1Ch. 5 - Prob. 2DQ1Ch. 5 - Prob. 1CTQ1Ch. 5 - Prob. 2CTQ1Ch. 5 - Prob. 1DQ2Ch. 5 - Prob. 2DQ2Ch. 5 - Prob. 1CTQ2Ch. 5 - Prob. 2CTQ2Ch. 5 - Prob. 1DQ3Ch. 5 - Prob. 2DQ3Ch. 5 - Prob. 1CTQ3Ch. 5 - Prob. 2CTQ3
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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
- What exactly is meant to be accomplished by using an Entity-Relationship Model, and how is this model used?arrow_forwardPlease provide a definition of an entity-relationship model as well as an explanation of how it works.arrow_forwardWhat are the characteristics of a strong entity set as opposed to a poor one?arrow_forward
- Describe the entity-relationship model in detail.arrow_forwardWhat is the purpose of entity-relationship diagrams? What sort of symbol is used to depict a connection, and how does it work? What exactly does the phrase "associative entity" imply and what does it mean? Give an example.arrow_forwardPlease describe what an entity-relationship model is as well as how it operates.arrow_forward
- Describe what an entity-relationship model is and how it functions in your own words.arrow_forwardJust what is the Entity-Relationship Model, and why is it used?arrow_forwardIn what way is it different between a weak entity and a strong entity that must have a connection with another entity?arrow_forward
- Explain the Entity-Relationship model and how it works.arrow_forwardWhat is the difference between a weak entity and a strong entity that is necessary to have a connection with another entity?arrow_forwardGiven 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…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