Description
Solve this file exactly by following the existing rules.
Assignment 2
Deadline: 16/04/2025 @ 23:59
[Total Mark for this Assignment is 8]
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Name: ###
ID: ###
CRN: ###
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the question.
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• Use Times New Roman font for all your answers.
Restricted – مقيد
Question One
Pg. 01
Learning
Outcome(s):
Question One
3 Marks
CLO 3,4
The Saudi Electronic University (SEU) plans to build a database to manage its academic
Design a
database starting
from the
conceptual design
to the
implementation of
database
schemas.
Create EntityRelationship
departments and their staff. Each department employs different types of employees, including
full-time professors, part-time lecturers, administrative staff, and student assistants. While all
employees share common attributes (such as ID, Name, and Email), each subclass has its
own specific attributes:
•
•
•
•
Full-Time Professors: Office Number
Part-Time Lecturers: Weekly Hours
Administrative Staff: Assigned Tasks
Student Assistants: GPA Requirement
Without drawing a diagram, clearly specify the components of the Enhanced Entity–
Relationship (EER) model based on the above scenario. Your specification must include the
following:
model, Relational
model, and write
SQL queries.
Restricted – مقيد
1. Entities and Attributes
o List all entities and their relevant attributes.
2. Specialization/Generalization
o Identify the superclass and subclasses.
o Specify whether the specialization is disjoint or overlapping.
o Specify whether the specialization is total or partial.
3. Relationships
o Include a ternary (or n-ary) relationship that is relevant to the context, such as
a project involving a full-time professor, a student assistant, and an external
sponsor.
Question Two
Pg. 02
Learning
Outcome(s):
CLO 3,4
Question Two
3 Marks
The Saudi Electronic University (SEU) wants to create a basic database to manage students
and the courses they register for. Each student has a unique student ID, and each course has
a unique course code.
Design a
database starting
from the
conceptual design
to the
implementation of
database
schemas.
Create EntityRelationship
model, Relational
model, and write
SQL queries.
Restricted – مقيد
Task:
1. Create the SQL Data Definition Language (DDL) statements for the following tables:
o STUDENT
o COURSE
o REGISTRATION (associative table showing which student registered for which
course)
2. Apply the following rules:
o Each student and course must exist before a registration can be recorded.
o If a student or course is deleted or updated, the change should cascade to
the registration table to maintain consistency.
o Include one CHECK constraint to ensure that credit_hours for a course is
between 1 and 5.
Question Three
Pg. 03
Learning
Outcome(s):
Question Three
2 Marks
Consider the following two tables:
CLO4 – Design a
database starting
Employees Table:
from the
conceptual design
to the
implementation of
database
schemas
EmployeeID
FirstName
LastName
DepartmentID
Salary
HireDate
1
Salah
Tariq
101
55000
15.03.2020
2
Ahmed
Muath
102
60000
22.07.2018
3
Fadhel
Mohammed
103
65000
10.05.2021
4
Saad
Nasser
101
70000
25.08.2019
5
Khaled
Ahmed
102
75000
11.01.2020
Department Table:
DepartmentID
DepartmentName
101
HR
102
IT
103
Marketing
Task:
o
o
o
o
Restricted – مقيد
Write a SQL query to retrieve the names of employees who were hired after January 1,
2020, and earn more than 60,000.
Write a SQL query to list the department names and the highest salary in each
department.
Write a SQL query to update the salary of the employee with EmployeeID = 2 to
65,000.
Write a SQL query to find the number of employees in each department and order the
results by the number of employees in descending order.
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