Design an ER Schema for a University Database Application


Consider the following set of requirements for a university database that is used to keep track of students' transcripts.

(a) The university keeps track of each student's name, student number, social security number, current address and phone, permanent address and phone, birthdate, class (freshman, sophomore, ..., graduate), major department, minor department (if any), and degree program (B.A., B.S., ..., Ph.D.). Some user applications need to refer to the city, state, and zip of the student's permanent address, and to the student's last name. Both social security number and student number have unique values for each student.

(b) Each department is described by a name, department code, office number, office phone, and college. Both name and code have unique values for each department. Departments have one faculty member designated as chair.

(c) Each course has a course name, description, course number, number of semester hours, level, and offering department. The value of course number is unique for each course.

(d) Each section has an instructor, semester, year, course, and section number. The section number distinguishes different sections of the same course that are taught during the same semester/year; its values are 1, 2, 3, ...; up to the number of sections taught during each semester.

(e) A grade report has a student, section, letter grade, and numeric grade (0, 1, 2, 3, 4 for F, D, C, B, A, respectively).

(f) The University has employees.  All employees are assigned a Social Security Number, a name, address, telephone number, email, birthdate, and start date.  Employees are divided into the following categories: faculty, staff, administration, contract workers, and student employees.  For faculty, faculty are assigned a specialty and department.  Staff are assigned a specialty, number of hours worked and a union.  Administration employees are assigned a job function. Contract workers are assigned a contracting company, hours worked, department work for and billing rate.  Student employees are assigned hours worked and billing rate.

Design an ER schema for this application, and draw an ER diagram for that schema. Specify key attributes of each entity type and structural constraints on each relationship type. Note any unspecified requirements, and make appropriate assumptions to make the specification complete.


The question belongs to Computer Science and it is about preparing an ER diagram for ER schema for a university with students' information. Various parameters are taken into consideration such as the student's name, ID number, course name, year, semester, section, etc. The solution has more details pertaining to this.

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