Draw an ER diagram with the following data: Entities: Student, Exam, Course ⚫ Relationships: • Student takes at least one exam o An exam is given to at least one student. 。 An exam concerns only one course o A course has a least one exam ■ Attributes: Stud_Roll No, Stud Name, Stud Age, Course_No, Course_Name, Course Hours, Exam_No, Exam date, Exam Duration, Exam_Mark.

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: Display employees (by name and address) from "Chicago" and with an annual salary between 60000…

A: The database management system is a collection of data and information and SQL languages are used…

Q: Transform the EER diagram to a set of relations and develop a relational schema.

A: ER-DIAGRAM:   A Diagram on Entity-Relationship (ER) is a flowchart that shows the way "entities"…

Q: Print the course code, start date, and number of attendants for all course offerings that had at…

A: According to bartleby strategy I am permitted to address explicit number of inquiries (counting…

Q: Explain why an index is only helpful if an attribute's values are sufficiently diverse.

A: Introduction Use of an index with a wide range of values A file index is a table or other data…

Q: What variables influence relationships, and how do they function?

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

Q: relation's main key and its functional interactions amongst its characteristics are interconnected

A: Please find the answer below :

Q: Create Entity Relational Diagram for Employee, Customer, Sales transaction, product, sales item…

A: Lets see the solution.

Q: 1. Display employees (by name and address) from "Chicago" and with an annual salary between 60000…

A: The given problem has a set of tables with primary keys and foreign keys identified in each table…

Q: Computer science What is the relationship between the primary key of a relation and the…

A: The Answer is in step2

Q: Task Description: consider the following relations for a university: Student (sid: integer, sname:…

A: Here I have created the tables and then inserted the dummy values into each table. Below is the…

Q: What challenges may arise as a result of a relationship's vertical partitioning, as well as the…

A:

Q: Explain why an index is only helpful if an attribute's values cover a suitable range. This is the…

A: The above question is answered in step 2 :-

Q: Employee: (EID, Name, City, Address) Department: (DID, Department_Name, City, budget) Works IN:…

A: All the above details that are mentioned above in the question we will take to solve the question:…

Q: Draw ERD and Map to Relations Map the ERD you have created to relations including all keys (PKs and…

A: ERD Diagram and Map to Relations:- A system's various entities and their relationships to one…

Q: WEEK 8 ASSIGNMENT   create a star schema for the Bob's Fixit Group Case Study  . The star schema…

A: Here we have given a star schema for the Bob's Fixit Group Case Study. you can find the solution in…

Q: Course evaluation must have a student, the students relation contains a unique student id, full name…

A: An Entity–relationship model (ER model) describes the structure of a database with the help of a…

Q: Title Pub Year Author Name ............ Book id M Book written-by Book Authors Branch id N M…

A: The following is just how the ER diagram is mapped to the relational schema:- Step-1:- Mappings of…

Q: hand draw an entity-relationship diagram to visually represent a database design this an example,…

A: Given: hand draw an entity-relationship diagram to visually represent a database design

Q: Relational Model EMPLOYEE Fname Minit Lname Ssn Bdate Address DEPARTMENT Dnamc Dnumbor Mgr_son…

A: What Is ER Diagram:ER, suggests the relationship between one entity to every other entity, and the…

Q: When it comes to relationships, what is the connection between the main key of a relation and the…

A: The connection between the main key of a relation and the functional dependencies among all…

Q: A "candidate key" is: any set of fields that determines the values of all other fields functionally…

A: Let's break down the other options:"any set of fields that determines the values of all other…

Q: Design: An (ER) and (relational Diagram) by showing as I am an owner of a car rental company…

A: Answer :

Q: ERD and Keys A hotel has many rooms.  A guest can make a reservation for one room or multiple…

A: ERD is called the Entity-Relationship model. ERD diagrams are used to draw the relationships between…

Q: REGION Region ID Region Name Belongs To ASSIGNMENT Score Hours Rate PROJECT Proj ID Proj Start Date…

A: ERD stands for Entity Relationship Diagram and it contains mainly three components that are…

Q: Reports to BRANCH BranchID BranchName BranchAddress (Street1, Street2, City, State ZIP)

A: A logical data model is similar in concept to using a map and an itinerary when going on a trip. You…

Q: Translate this ER diagram into a relational schema, Choose appropriate data types for each attribute…

A: The relational model in DBMS is a theoretical model used to coordinate and deal with the information…

Q: Explain the usage of attributes and the generic name for attribute in the relationship mode

A: I have provided answer in step2

Q: Q2- What is a composite entity, and when is it used?

A: Entity – Entities are actual world items that structure the essential locks around which the entire…

Q: A ternary relationship is a relationship which includes Select one: O a. Two entities O b. Three…

A: In unary relationship, only one type of entity participate in that relationship.   In binary…

Q: 1 having M M Volunteer VolunteerShift Position hires M has Pending NonPending M Event 1 has Location…

A: The schema is given as follows. Relational Diagram (Schema) Position: Position_ID Title…

Q: OGICAL DATABASE DESIGN The above EER-Diagram represents a University Library Membership (see…

A: The given problem is related to database modeling where the Enhanced Entity Relationship model is…

Q: Given the following ERD. ID name salary Instructor Grades teaches ID name salary Student 1) What is…

A: - We need to talk about the ERD diagram provided.

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: Which statement is associated with two seperate entities. a) Attribute b) Entity Type c) Reflective…

A: The question is asking to identify the term that is associated with two separate entities in the…

Q: Draw an E-R diagram based on the following relational design.SeniorTeachers(teacherId, name, dept,…

A: Here's the E-R diagram based on the provided description:``` +-----------------+…

Q: entities: Residential students which fields like student id, Student name, exam papers Transfer…

A: Given entities: Residential students which fields like student id, Student name, exam papersTransfer…

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.