# CS403 Assignment 2 Solution and Discussion

• Assignment 2 CS403 file Solution Fall 2020
@zaasmi
Question: In this technological era manually managing any system is a time-consuming task. A construction company named “Global Construction” wants to computerize their manual system, so that they can easily and efficiently manage their employees, clients, projects and finance. It will be beneficial for both clients and company. Company has different employees who work on different projects. Global Construction database system will store all the information in an organized manner by following the below business rules:
Client can visit the website, view completed projects details and client’s review/feedback about projects, places an order by filling the order form, give review/feedback.
Manager can assign projects to employees, view assigned projects. Manger can also view placed orders, can accept or cancel the order. He can also generate receipt; client will be able to view and download the receipt. Employees will be able to view assigned projects, he can also update status of the project as started, partially completed, or completed.
Required
• Draw the ER diagram.

• Draw relationship cardinalities in alphabetical notation.

• Consider the following relations/tables and perform the following binary operations and write the output:

CreditCard
card_number expriy_date
Cardnumber001 23/5/2025
Cardnumber002 24/6/2025
Cardnumber003 25/7/2025
Shelve
Shelve_id Number
Sh001 1
Sh002 2
Sh003 3

(Shelve) U (CreditCard)
(CreditCard) – (Shelve)

• Perform the following operations on the mentioned table and write the corresponding output:
∏ Med_id, Name, Expiry_date (σ Price<= 20 (Medicine))

• Find the degree and cardinality of the following tables (given in 2nd question):
Table Cardinality Degree
Pharmacist
Medicine
Shelve

• Consider the following tables and perform cross matrix of Shelve, Medicine and Pharmacist
(Shelve X Medicine X Pharmacist)

Pharmacist
Ph003 Ather Karachi
Medicine
Med_id Name Price Expiry_date
Md002 Disprin 20 22/3/2023
Md003 Brufen 40 22/4/2024
Shelve
Shelve_id Number
Sh001 1
Sh002 2
Sh003 3
Solution
f

• Convert the above entity relationship diagram into relational data model. You have to convert all the three important components (entities, attributes and relationships between different entities) of the entity relationship diagram into relational data model.

2

1

1

2

6

1

7

5
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