Please clear and correct answer. Considering the following ER-Diagram, answer the following questions:Course OfferingsTime : datetimeStudentSID : intName : varchar(255)Program : varchar(255)Student_CourseSectionNum : intRoomld : intCourseNo : intSemester : char(2)Year : intStudentSID : intStudentSID : IntMarks: intExaminationID : intStudent_Course StudentSID : intName : varchar(255)Place : varchar(255)Columna) What is the main role of an ER diagram in data modelling?b) How many courses each student can have?c) What is the relationship degree between the entities?d) Is there an associative entity, if yes can you name it?e) What is uniquely identifying the student entity table (Primary Key)?

a) What is the main role of an ER diagram in data modelling? Ans)ER diagram in data modelling helps…

a) What is the main role of an ER diagram in data modelling? b) How many courses each student can have? c) What is the relationship degree between the entities? d) Is there an associative entity, if yes can you name it? e) What is uniquely identifying the student entity table (Primary Key)?

a) What is the main role of an ER diagram in data modelling? b) How many courses each student can have? c) What is the relationship degree between the entities? d) Is there an associative entity, if yes can you name it? e) What is uniquely identifying the student entity table (Primary Key)?

Principles of Information Systems (MindTap Course List)

12th Edition

ISBN:9781285867168

Author:Ralph Stair, George Reynolds

Publisher:Ralph Stair, George Reynolds

Chapter5: Database Systems And Applications

Section: Chapter Questions

Problem 4PSE: Using a graphics program, develop an entity-relationship diagram for a database application for an...

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Complete the ERD below by dragging the ends of crows feet and the specialization hierarchy symbols to their correct location. The XYZ Company has a motor pool and wants to track scheduled and unscheduled maintenance to each of the vehicles in its fleet. Each vehicle is assigned a unique unit number that will be used on all paperwork and is displayed on the vehicle. In addition to the unit number all vehicles have a unique Vehicle Identification Number (VIN) that is a long and complex string of letters and numbers, and all vehicles belong to one of three types "T" for trucks, "R" for trailers, and "A" for automobiles. For trucks, we need to know the Gross Vehicle Weight (GVW) and the type of trailer hitch (if it has one). For trailers, we need to know their length, the maximum weight allowed, the type of trailer (Van, Reefer, Low Boy, Flat…), and the required hitch type. For automobiles, we need to know how many adults it will seat, its color, and if it is a "4 wheel drive". Maintenance…
Complete the ERD below by dragging the ends of crows feet and the specialization hierarchy symbols to their correct location. The XYZ Company has a motor pool and wants to track scheduled and unscheduled maintenance to each of the vehicles in its fleet. Each vehicle is assigned a unique unit number that will be used on all paperwork and is displayed on the vehicle. In addition to the unit number all vehicles have a unique Vehicle Identification Number (VIN) that is a long and complex string of letters and numbers, and all vehicles belong to one of three types "T" for trucks, "R" for trailers, and "A" for automobiles. For trucks, we need to know the Gross Vehicle Weight (GVW) and the type of trailer hitch (if it has one). For trailers, we need to know their length, the maximum weight allowed, the type of trailer (Van, Reefer, Low Boy, Flat…), and the required hitch type. For automobiles, we need to know how many adults it will seat, its color, and if it is a "4 wheel drive". Maintenance…