This is database assignment for starter student.

1. National College of Business
Administratiion & Economics
Assigment : Travel Agency ER Diagram for Database
Prepared For
Sir Shujat Ali sb
Prepared By
Muhammad Asif
Roll # 3905
MCS Semmester -III

2. ER Diagram for Travel Agency

3. M: N Unary relationship:
A subject have many other subjects as prerequisites and each subjects as be a prerequisites to
many other subjects.
Is prerequisites for
1:M Unary relationship:
An employee may manage many employee, but an employee is managed by only one
employee.
Manages
1:1 Unary relationship:
A Person may married to only one person.
Is married to
SUBJECTS
EMPLOYEES
PERSONS