Give an example of each of the three types of relationships.

Q: Create an E-R model for the following scenario. Show entity names, primary keys, attributes for each…

A: We need to create ER diagram for above case studies See below step for diagram.

Q: In a few words, describe the logical relationship between the entities, attributes, and…

A: Introduction: An entity is a piece of data or a physical object. It is possible to save information…

Q: For each entity, there needs to be an indication of whether it is one-to-one, one-to-many or…

A: The answer is

Q: Explain what the Entity-Relationship model is and what its purpose is

A: Entity Relationship model is a simple diagram which depicts the structure of tables and the…

Q: Q1 / answer the following: 1- The difference between relational data model and entity- relationship…

A: 1. In Relational data model , the relationship between entity is represented using table. While…

Q: Explain Basic concepts and definitions in relationships?

A: Given: Explain Basic concepts and definitions in relationships?

Q: Describe Unary Relationships?

A: Some of the type of relationship we can have are Unary Binary Ternary The number here describes…

Q: Identify the degree and cardinalities of the relationship?

A: 1.What is a degree in DBMS? The degree of a relationship is the number of entity types that…

Q: How are entity-relationship diagrams used? What kind of symbol is utilized to represent a…

A: How are entity-relationship diagrams used? Ans:  Entity-Relationship Model (ER Modeling) is a…

Q: For each of the below relationships, provide an explanation of what it is and a relevant example.…

A: One - to - many relationship One - to-many is a relationship cardinality in database entities. In…

Q: Give an example of each of the following, other than those described in this chapter, and clearly…

A: Ternary relationship: In this kind of relationship three entities participate to make a…

Q: Relationship Type? (M:1, 1:1 etc) and Relationship trength? .What are the Cardinalities in the…

A: Q)1)Relationship Type: One-to-One Relationship One-to-Many or Many-to-One Relationship Many-to-Many…

Q: What does it mean to be a weak entity? Set a good example.

A: Introduction: Although an entity type should contain a key attribute that uniquely identifies each…

Q: Multiplicity is the same as what concept for an ERD? a. Relationship b. Attribute c. Entity d.…

A: multiplicity constraint represents for a relationship type. It represents the number (or range) of…

Q: Give an example of how attributes are used in a relationship model, and what the generic term for an…

A: Entities in the ER model contain characteristics that may be single-valued, multi-valued, composite,…

Q: example

A: Ternary relations:- When three entities are involved and taking part in a relationship then it is…

Q: Define the term degree of relationship. Give an example, other than one used in this text, of a…

A: Degree of relationship :-

Q: Provide examples of how relationships are represented using attributes and the general term for an…

A: Introduction: Attributes are specifications that describe the properties of an object, element, or…

Q: lame the THREE (3) components that are considered to be part of any data Comment on the extent to…

A: Lets see the solution.

Q: difference between single-valued attributes and simple attributes

A: Difference between single-valued attributes and simple attributes A simple attribute refers to an…

Q: Interpret the different form of Entity used in the given scenario of ER diagram. Illustrate the…

A: Strong entity Account Region Item creep Weak Entity Character Item Instantiation creep…

Q: List the three types of relationship degrees described in the chapter and give an example of each.

A: Degree of relationshipThe number of entity types that took part inthe entity relationship is known…

Q: Does the “is a” relationship work in reverse? Why or why not?

A: "is a" Relationship: “No”, “is a” relationship is not work in reverse because,

Q: Whenever patients are seen for the first time, they complete a patient information form that asks…

A: The solution for the above given question is given below:

Q: The cardinality ratio depends on the real-world meaning of the entity types involved and is defined…

A: 1. Each student can have only one social security number and a social security number can belong to…

Q: Draw the associations that are described by the business rules below. Include the multiplicities for…

A: The patient has the following attributes. AadharNo Name Address MobileNo Age   The doctor has the…

Q: Give some specific guidelines for defining relationships?

A: Guidelines for defining relationship: Choose a partner well Respect Know your needs and speak…

Q: Define the term relationship and give an example other than those used in this book.

A: Definition of relationship: A relationship is any connection between two types of entities. The…

Q: Using examples, summarise the ways in which ternary relationships differ from unary and binary…

A: Well, A binary relationship is the relation between two entities participate and is the most common…

Q: Many to many relationships (a non spcific relationship) are resolved into a pair of one-to-many…

A: Many to many relationships (a non spcific relationship) are resolved into a pair of one-to-many…

Q: Explain briefly four concerns that may arise when two or more relationships are combined.

A: Introduction: Four challenges arise during the merger of relations, each with a remedy.

Q: The cardinality ratio depends on the real-world meaning of the entity types involved and is defined…

A: 1. Student can only one social Security number while a social Security number can belong to only one…

Q: Modify the Er diagram given below and add these Weak entity Identifying relationship Weak…

A: ER Diagram using these  Weak entity Identifying relationship Weak relationship Key attribute…

Q: Multiplicity is the same as what concept for an ERD? a. Relationship b. Attribute c. Entity d.…

A: Please see the next step for solution

Q: Give an example of a ternary relationship (different from any example presented herein).

A: The university or college needs a record that which teacher teaches which subject in the college or…

Q: When mapping the (M To N) relationship all we do is move the key attribute to one side from the many…

A: Lets see the solution.

Q: Illustrate an Entity-Relationship Diagram (ERD) model using Crow’s Foot notation  Here we can have…

A:

Q: Use an appropriate example to explain Entity Relationship Diagram.

A: Entity Relationship Diagram Entity–relationship diagram describes a structure of the database with…

Q: Why is it recommended that every ternary relationship be converted into an associative entity?

A: GIVEN: Why is it recommended that every ternary relationship be converted into an associative…

Q: Give an Example of relationships of different degrees?

A: Degree of a Relationship • A degree of a relationship is the total number of entity types which are…

Q: What influences relationships and how do they function?

A: The various kinds of relationship characteristics will be discussed in this article.

Q: Define the term entity and give an example other than those used in this book.

A: Answer: An entity may be an object with a physical existence (for example, a particular person,…

Q: Explain briefly four issues that may occur when combining two or more relationships.

A: During the merger of relations, four issues develop, each with a solution. Relation: The…

Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.