Er diagram example Some er diagram example: Question 1: Suppose you are given the following requirements for a simple database for the National Hockey League (NHL): • the NHL has many teams, • each team has a name, a city, a coach, a captain, and a set of players, • each player belongs to only one team, • each player has a name, a position (such as left wing or goalie), a skill level, and a set of injury records, • a team captain is also a player, • a game is played between two teams (referred to as host_team and guest_team) and has a date (such as May 11th, 1999) and a score (such as 4 to 2). Construct a clean and concise ER diagram for the NHL database. Answer: Question 2: A university registrar’s office maintains data about the following entities: • courses, including number, title, credits, syllabus, and prerequisites; • course offerings, including course number, year, semester, section number, instructor(s), timings, and classroom; • students, including student-id, name, and program; • instructors, including identication number, name, department, and title. Further, the enrollment of students in courses and grades awarded to students in each course they are enrolled for must be appropriately modeled. Construct an E-R diagram for the registrar’s ofce.Document all assumptions that you make about the mapping constraints.

Show an E-R diagram illustrating the use of all. Registrar™s of˚ce probably has to answer general questions about. Recent cs143 l1 solutions chap2. Driver Usb Modem Zoom X5 Manual. pdf. ER Diagram Questions with Solution. To subscribe EDUGRABS and receive. Er-diagram-exam pdf; entity relationship diagram questions and.

Answer: Question 3: (a) Construct an E-R diagram for a car-insurance company whose customers own one or more cars each. Each car has associated with it zero to any number of recorded accidents. Answer: (b) Construct appropriate tables for the above ER Diagram? Car insurance tables: person ( driver-id, name, address) car ( license, year,model) accident ( report-number, date, location) participated( driver-id, license, report-number, damage-amount) Question 4: (a) Construct an E-R diagram for a hospital with a set of patients and a set of medical doctors.

Associate with each patient a log of the various tests and examinations conducted. Die Gilde 2 Gold Edition Kostenlos. Answer: (b) Construct appropriate tables for the above ER Diagram: Patient(SS#, name, insurance) Physician ( name, specialization) Test-log( SS#, test-name, date, time) Doctor-patient (physician-name, SS#) Patient-history(SS#, test-name, date) Question 5: Consider a database used to record the marks that students get in different exams of different course offerings. A) Construct an E-R diagram that models exams as entities, and uses a ternary relationship, for the above database. Answer a: b) Construct an alternative E-R diagram that uses only a binary relationship between students and course-offerings. Make sure that only one relationship exists between a particular student and course-offering pair, yet you can represent the marks that a student gets in different exams of a course offering.