Consider the following set of requirements for a UNIVERSITY database that is used to keep track of students’ transcripts. This is similar but not identical to the database shown in Figure 1.2: a. The university keeps track of each student’s name, student number, Social Security number, current address and phone number, permanent address and phone number, birth date, sex, class (freshman, sophomore, ..., graduate), major department, minor department (if any), and degree program Exercises 235 (B.A., B.S., ..., Ph.D.). Some user applications need to refer to the city, state, and ZIP Code 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 number, and college. Both name and code have unique values for each department. c. Each course has a course name, description, course number, number of semester hours, level, and offering department. The value of the course number is unique for each course. d. Each section has an instructor, semester, year, course, and section number. The section number distinguishes 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, or 4). Design an ER schema for this application, and draw an ER diagram for the 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
7.16. Consider the following set of requirements for a UNIVERSITY
used to keep track of students’ transcripts. This is similar but not identical to
the database shown in Figure 1.2:
a. The university keeps track of each student’s name, student number, Social
Security number, current address and phone number, permanent address
and phone number, birth date, sex, class (freshman, sophomore, ..., graduate), major department, minor department (if any), and degree program
Exercises 235
(B.A., B.S., ..., Ph.D.). Some user applications need to refer to the city,
state, and ZIP Code 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 number, and college. Both name and code have unique
values for each department.
c. Each course has a course name, description, course number, number of
semester hours, level, and offering department. The value of the course
number is unique for each course.
d. Each section has an instructor, semester, year, course, and section number. The section number distinguishes 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, or 4).
Design an ER schema for this application, and draw an ER diagram for the
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
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