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Database Design Solutions

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COMSATS University Islamabad
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Question 1:
You are required to create a conceptual data model of the data requirements for a company that
specializes in IT training. The Company has 30 instructors and can handle up to 100 trainees
per training session. The Company offers five advanced technology courses, each of which is
taught by a teaching team of two or more instructors. Each instructor is assigned to a maximum
of two teaching teams or may be assigned to do research. Each trainee undertakes one advanced
technology course per training session.
a. Identify the main entity types for the company.
b. Identify the main relationship types and specify the multiplicity for each relationship.
State any assumptions you make about the data.
c. Using your answers for (a) and (b), draw a single ER diagram to represent the data
requirements for the company.
Answer:
Part (a):
The main entities for the above scenario are as follows:
1. Instructors
2. Trainee
3. Training Session
4. Teaching Team
5. Technology Course
Part (b):
Instructor
Belongs
Teaching Team
Research
Assigned
Instructor
Teaching Team
Teaches
Technology Course
Training Sessions
Offers
Technology Course
Trainee
Undertake
Training Sessions

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