Suppose that we have the following requirements for a university database that is used to
keep track of students’ transcripts:
a. The university keeps track of each student’s name (Sname), student number (Snum),
Social Security number (Ssn), current address (Sc_addr) and phone (Sc_phone),
permanent address (Sp_addr) and phone (Sp_phone), birth date (Bdate), sex (Sex),
class (Class) (‘freshman’, ‘sophomore’,…,’graduate’), major department
(Major_code), minor department (Minor_code) (if any), and degree program (Prog)
(‘b.a’,’b.s’,…,’ph.d’). Both Ssn and student number have unique values for each
student.
b. Each department is described by a name (Dname), department code (Dcode), office
number (Doffice), office phone (Dphone) and college (Dcollege). Both name and
code have unique values for each department.
c. Each course has a course name (Cname), description (Cdesc), course number (Cnum),
number of semester hours (Credit), level(Level), and offering department (Cdept).
The course number is unique for each course.
d. Each section has an instructor (Iname), semester (Semester), year (Year), course
(Sec_course), and section number (Sec_num). 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 total number of sections taught during each semester.
e. A grade record refers to a student (Ssn), a particular section, and a grade (Grade).
Design a relational database schema for this database application. First show all the
functional dependencies that should hold among the attributes. Then design relation
schemas for the database that are each in 3NF or BCNF. Specify the key attributes of
each relation. Note any unspecified requirements, and make appropriate assumptions
to render the specification complete.