single instance of the entity?  There must be a maximum of one attribute instance. There must be many instances of the attribute. There must be at most one entity instance that each attribute instance describes. There must be at least one instance of the attribute. There must be zero or more instances of the attribute.

Q: • Consider the following scenario A company provides catering services for clients who need…

A: Actually, given information: A company provides catering services for clients who need…

Q: n the attached diagram, which of the following statements are true?       primary key for section…

A: Weak entities are represented with double rectangular box in the ER Diagram and the identifying…

Q: Where you can apply all the normalization rules to attributes. Furthermore, you also need to explain…

A: Normalization Rules Normalization rules for entity-relationship diagrams are based on (and are…

Q: QUESTION 18 Match the term that best fits its definition. v Alternate Key A A minimal set of…

A: Find Your Matching Table Below

Q: Q.No.1.a. Draw ER- notation for the given elements of ER-Model. Entities Strong Entity Weak Entity…

A: Note: The solutions of the first three subparts of question 1 are shown below. Please repost the…

Q: Regards to the diagram below (figure 4.12), answer the following questions using the multiple-choice…

A: The answers for the following question can be derived from the diagram given. How is of_type…

Q: Create an Entity-Relationship Model to represent the data requirements of the problem given below.…

A: ERD for the given requirement: No of Entities: Person entity Employee Alumnus Student Staff Faculty…

Q: Discuss the concept that an attribute that is part of a composite primary key is also a candidate…

A: A candidate key is a single field or a composite expression that meets the requirements of a primary…

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: a. Draw ER- notation for the given elements of ER-Model. 1. Entities a. Strong Entity b. Weak Entity…

A: Strong Entity: Weak Entity: Associate Entry:

Q: An instructor has several phone numbers.  When reducing the ER diagram down to a schema this must be…

A: Actually, ER is describes the structure of database with help of diagram.

Q: Consider the below ERD in Figure 03 of Student Enrolment system and answer the below questions.…

A: List the strong (non-weak) entity types in the ER diagram. Student Enrollment Lecturer Subjects…

Q: Give an example of how the distinction between a candidate key and an entity type identifier is…

A: Entity Identifiers: Entity IDs are critical properties that are used to uniquely identify each…

Q: The following statements are correct for. 1. Certain attributes may apply to some but not all…

A: Generalization: Based on the common features that exists among a set of entities,  they can be…

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: A entity instance of one type related to exactly one-entity instance of another type is------? Many…

A: A entity instance of one type related to exactly one-entity instance of another type is------?…

Q: Design an Entity-Relationship for each system described below. Use the (min,max) notation. State…

A: An entity is the relationship model which describes the interrelated things in a domain. A basic ER…

Q: A person can be an employee, alumnus, or a student. For a person, P_id (identifier), date of birth,…

A: ERD for the given requirement: No of Entities: Person entity Employee Alumnus Student Staff Faculty…

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

A: Identifying the functional dependencies: The relationship sets can be indicated using the functional…

Q: Write down the many kinds of attributes in the Entity-Relationship (ER) model.

A: Given: 1. Make a list of the different kinds of characteristics that are used in the…

Q: A simple(Atomic) attribute is Select one: O a. an attribute that can be devided to smaller sub parts…

A: A simple (atomic) attribute is__________?

Q: We can convert any weak entity set to a strong entity set by simply adding appropriate attributes.…

A: Explanation: Weak entity set avoids the data duplication and consequent possible inconsistencies…

Q: What is the attribute that could be obtained using other attributes in the Entity-Relationship…

A: Introduction: What is the attribute that could be obtained using other attributes in the…

Q: Create an Entity-Relationship Model to represent the data requirements of the problem given below.…

A: ERD for the given requirement: No of Entities: Person entity Employee Alumnus Student Staff Faculty…

Q: Draw an ER diagram for the airport database. Be sure to indicate the various attributes of each…

A: ER : ER Diagram stands for Entity Relationship Diagram, also known as ERD is a diagram that displays…

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: can be converted to a strong entity set by simply adding the appropriate attributes. Why,

A: For the following reasons, a weak entity set is required:

Q: In an entity-relationship model, which of the following is a kind of attribute that should have some…

A: Required attribute is an attribute that must have a value in it. hence, it can not be left empty.

Q: There are two alternative methods of representing an employee’s optional (single) phone number.  The…

A: An element type ought to have a key characteristic which exceptionally recognizes every element in…

Q: What is the difference between a weak entity and a strong entity that is necessary to have a…

A: This question comes from Database Management System which is a paper of Computer Engineering. Let's…

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

A:

Q: Describes a relationship in which each instance of data in one entity is represented by only one…

A: The following are the three types of relationships that exist between entities: One-One…

Q: • Apply the appropriate data types to each attribute in all entities • Show relationships between…

A: the EER diagram is an below :

Q: Using the relations ATTACHED, normalize your relations into first, second, and third normal forms.…

A:

Q: Applying your knowledge in Enhanced Entity Relationship modeling, Develop an EER model for the…

A: Answer: We will draw our EER model for the given situation, using the traditional EER notation or…

Q: Consider a Mail_Order database in which employees take orders for parts from customers. The data…

A: The following is a ER- diagram for a mail-order system with various parameter. An ER diagram is an…

Q: relationship between entities and attributes.

A: EMPLOYEE(EMP_NUM, EMP_LNAME, EMP_INITIAL, EMP-DOB) Here, primary key = EMP_NUM DEPENDENT(EMP_NUM,…

Q: What is the distinction between an entity class and an entity instance?

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

Q: Question 3 Discuss in detailed explanation that the concept that an attribute that is part of a…

A: The concept that an attribute that is part of a composite primary key is also a candidatekey:

Q: is a piece of information used to describe an entity. a. Attribute b. Associative Entity Cardinality…

A: Answering 4 and 5.  According to the policies I can't solve multiple questions in one question…

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.