Entity-relationship Diagram Exercises And Answers Pdf Guide

\sectionExercise 4: Hospital Management (Ternary Relationship) \textbfScenario: \\ A hospital records which doctor treats which patient on which date. \beginitemize \item \textbfDoctor: doctor\_id (PK), name, specialty. \item \textbfPatient: patient\_id (PK), name, illness. \item \textbfTreatment Date: date. \item A doctor may treat many patients on a given date; a patient may be treated by many doctors; and each treatment happens on a specific date. The combination (doctor, patient, date) is unique. \enditemize

\sectionIntroduction This document contains a collection of Entity-Relationship Diagram (ERD) exercises designed to help you practice database modeling. Each exercise presents a real-world scenario. Try to draw the ERD on your own first, then check the provided solution. entity-relationship diagram exercises and answers pdf

% Relationship \node[diamond, draw, aspect=2, minimum width=2cm, minimum height=1cm, below=1.2cm of $(student.south)!0.5!(course.south)$] (enroll) ENROLLS; \node[below=0.2cm of enroll, align=center] \tiny enrollment\_date; \item \textbfTreatment Date: date

\sectionExercise 6: Supertype/Subtype (Generalization) \textbfScenario: \\ A vehicle rental system tracks vehicles. A vehicle can be either a Car or a Truck. \beginitemize \item All vehicles have: VIN (PK), make, model, year. \item Cars have: number of doors, fuel type. \item Trucks have: cargo capacity (tons), number of axles. \enditemize \item Cars have: number of doors