Consider the following information about a university database: Professors have an SSN, a name, an age, a rank, and a research specialty. Projects have a project number, a sponsor name (e.g., NSF), a starting date, an ending date, and a budget. Graduate students have an SSN, a name, an age, and a degree program (e.g., M.S. or PhD.). Each project is managed by one professor (known as the project’s principal investigator). Each project is worked on by one or more professors (known as the project’s coinvestigators). Professors can manage and/or work on multiple projects. Each project is worked on by one or more graduate students (known as the project’s research assistants). When graduate students work on a project, a professor must supervise their work on the project. Graduate students can work on multiple projects, in which case they will have a (potentially different) supervisor for each one. Departments have a department number, a department name, and a main office. Departments have a professor (known as the chairman) who runs the department. Professors work in one or more departments, and for each department that they work in, a time percentage is associated with their job. Graduate students have one major department in which they are working on theirdegree. Each graduate student has another, more senior graduate student (known as a student advisor) who advises him or her on what courses to take.Design and draw an ER diagram that captures the information about the university.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

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Consider the following information about a university database:
 Professors have an SSN, a name, an age, a rank, and a research specialty.
 Projects have a project number, a sponsor name (e.g., NSF), a starting date, an ending
date, and a budget.
 Graduate students have an SSN, a name, an age, and a degree program (e.g., M.S. or
PhD.).
 Each project is managed by one professor (known as the project’s principal
investigator).
 Each project is worked on by one or more professors (known as the project’s coinvestigators).
 Professors can manage and/or work on multiple projects.
 Each project is worked on by one or more graduate students (known as the project’s
research assistants).
 When graduate students work on a project, a professor must supervise their work on
the project. Graduate students can work on multiple projects, in which case they will
have a (potentially different) supervisor for each one.
 Departments have a department number, a department name, and a main office.
 Departments have a professor (known as the chairman) who runs the department.
 Professors work in one or more departments, and for each department that they work
in, a time percentage is associated with their job.
 Graduate students have one major department in which they are working on their
degree.
 Each graduate student has another, more senior graduate student (known as a student
advisor) who advises him or her on what courses to take.
Design and draw an ER diagram that captures the information about the university.

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