Explain the difference between a candidatekey and the identifier of an entity type.

Q: Discuss the classification of traceability relations elicit brief an example that defines the…

A: traceability relations :- the degree to which a relationship can be established between two or more…

Q: Define Associative entity

A: Ans:-  An associative entity is  a type of entity in which the table that associates two other…

Q: An attribute is a descript­ive property of an entity.

A: An entity is a “thing” or “object” in the real world that is distinguishable from all other objects.…

Q: The use of composite attributes are avoided in relation schema when the relation schema conforms to…

A: The use of composite attributes, are avoided in a relation schema when it is said to be in First…

Q: What is the functional relationship between the main key and a non-key attribute as explained by…

A: The connection between any two characteristics is known as functional dependency. For example, there…

Q: in ERD, an Entity with a partial key is named: O Weak Entity O Srong Entity O Partial Entity O…

A: Answer : option A is correct weak entity .

Q: Can instances of a relation (sample data)prove the existence of a functional dependency? Why or why…

A: Lets see the solution.

Q: TRUE or FALSE - Generalization (is-a) is the relationship established between entities to show that…

A: Answer: the given statement is false

Q: An attribute that may take on more than one value for each entity instance in ERD is referred to as…

A: Answer :- option D) multivalued attribute

Q: Define the terms functional dependency and determinant, using an example not from this book

A: A statement which tells the character of a relationship between two or more variables, even though…

Q: Generalization is the process of defining a general entity type from a collection of specialized…

A: Generalization is a process of a new entity being formed using the collection of two or more…

Q: What is the definition of an Entity set?

A: Answer An entity set is a logical container for instances of an entity type and instances of any…

Q: QUESTION 2 in ERD, an Entity with a partial key is named: O Partial Entity O Srong Entity O Weak…

A: Strong Entity is an entity which is not dependent on other entity and have a primary key. Its…

Q: Make a list of the characteristics you'd want to see in an entity identification property.

A: Answer:

Q: Distinguish between the ways in which functional dependencies may be utilized to express the…

A: Identifying the functional dependencies entails the following steps: The functional dependencies may…

Q: What exactly is included in the Weak Entity set?

A: A weak entity is one that can only exist when owned by another one.

Q: How do you know whether to convert a relationship to an associative entity type?

A: These entities are used when user wants a relationship to be mixed in a relationship.For example…

Q: Write the relation matrix for the Boolean nor. What is the identity for nor?

A: A logical matrix, binary matrix, relation matrix, Boolean network, or (0,1) matrix is a matrix with…

Q: Define the term Well-structured relation?

A: Well-structured relation • A well-structured relation is defined as the phenomenon where the…

Q: Create an entity na

A: One to one mapping is a association of instance of one entity to instance of another entity. Here…

Q: Create an unnormalized relation using student and class entities.

A: Here, we have to create an unnormalized relation using student and class entities.

Q: What is an entity set?

A: An entity set is a group of similar entities and these entities can have attributes.

Q: Describe how the weak entity of an E-R diagram is transformed into relations

A: E-R (Entity Relationship) diagrams: An entity-relationship diagram is an image or snapshot of the…

Q: Multivalued dependencies are avoided in relation schema when the relation schema conforms to – (a)…

A: Answer: Multivalued dependencies are avoided in relation schema when the relation conforms to 4NF.…

Q: What does the term "Entity type" mean?

A: Entity type: A This concept describes a person, an organization, an object type, or a concept about…

Q: Explain the difference between an entity class and an entity instance.

A: Entity: Entity may be a thought to abstractly represent all instances of a bunch of comparable…

Q: Build an entity-relationship diagram, deriving relations and validating relations using…

A: entity-relationship diagram

Q: Are associative entities also weak entities? Why or why not? If yes, is there anything special about…

A: Associative entity: • An associative entity associates the instances of one or more entity types. •…

Q: Explain how functional dependencies can be used to indicate the following:• A one-to-one…

A: The functional dependency is a relationship that exists between two attributes. It typically exists…

Q: Describe entity integrity constraint in your own words.

A: Please give positive ratings for my efforts. Thanks.   ANSWER   The two main data integrity…

Q: It is possible to can convert any weak entity set to a strong entity set by simply adding…

A: To avoid the inconsistencies caused by duplicating the key of the strong entity. Though a weak…

Q: Describe how the regular entity type of an E-R diagram are transformed into relations

A: Given: Describe how the regular entity type of an E-R diagram are transformed into relations

Q: Consider the following E/R diagram with isa relationships, in which every node represents an entity…

A:

Q: The "Title" attribute in "BOOK" Entity Type is considered as: Main Sub

A: Here the attribute is further divided as Main and Sub.

Q: Explain the functional dependency between the primary key and a non-key attribute via another…

A: Functional Dependency – It is the relationship between any two attributes. Example:  In relation,…

Q: Define the connection between a relation's main key and the functional relationships between all of…

A: Introduction: As the name implies, a functional relationship expresses the influence of one variable…

Q: The ISBN in the image below for "BOOK" Entity type is considered as:

A: Required: The ISBN in the image below for "BOOK" Entity type is considered as:

Q: What happens if a super set object doesn't have a UID when using the arc implementation to turn it…

A: INTRODUCTION:

Q: Explain how functional dependencies may be used to indicate: • The entity sets student and teacher…

A: Justification: A functional dependence is an attribute-to-attribute link. We may get the value of…

Q: State a rule that says when to extract an attribute from one entity type and place it in a linked…

A: Let’s first understand what is entity type and attributes: Entity Type: A group of different…

Q: What distinguishes a weak entity from a strong entity required to connect with another entity is not…

A: Introduction: A weak entity from a strong entity required to connect with another entity is not…

Q: STION 9 is used to represent the M: N relationships between two or more entities. A Mandatory B.…

A: M:N relationship: Relationships helps to connect the  related information between the  tables. They…

Q: What is the link between the main key of a relation and the functional connections between all of…

A: Introduction: Primary and foreign keys are the cornerstones of relational database theory. Primary…

Q: Create ER duagram of the foloowing information and also find entity identification, Rekationship…

A: For the given scenario the ER diagram has…

Q: Where do entity supertype stored at.

A: supertype entity in the data model with definition , examples, and explanation.

Q: The descriptive property possessed by cach entity set is atn): A Attribute. B Instance. C Relation.…

A: The descriptive property possessed by each entity set is a(n), Then correct option is A. A.…

Q: Explain how the representation of weak entities differs from the representation of strong entities

A: The entity is a representation of an object, or table, or thing in a database management system.…

Concepts in Designing Database

A database design is the process of data organization based on a database model. The process deals with identifying what data should be stored in a database and how data elements relate to each other.

Entity Relationship Diagram

Complex real-world applications call for large volumes of data. Therefore, it is necessary to build a great database to store data safely and coherently. The ER data model aids in the process of database design. It helps outline the structure of an organization’s database by understanding the real-world interactions of objects related to the data. For example, if a school is tasked to store student information, then analyzing the correlation between the students, subjects, and teachers would help identify how the data needs to be stored.