Re: CS614 Assignment 2 Solution and Discussion

Assignment No. 2
Semester: Spring 2020
CS614 – Data Warehousing
Total Marks: 15

Due Date:
June 17, 2020

Objectives:
After completing this assignment, the students will be able to:
• De-Normalize the given table using horizontal splitting technique
• Calculate the Total space used with normalization.
• Calculate the Total space used after de-normalization.

Instructions
Please read the following instructions carefully before submitting assignment:
It should be clear that your assignment will not get any credit if:

• Assignment is submitted after due date.
• Submitted assignment does not open or file is corrupt.
• Assignment is copied (From internet/ to from students).
• Assignment is submitted other than word format (.doc, .docx).

Assignment

Question No. 1

Consider the following table having the information of students of a university:

Student ID	Student Name	Campus ID	Student Age	Degree Program
1	Ali	VLHR01	27	MS
2	Kamran	VISB01	24	BS
3	Akmal	VRWP01	24	BS
4	Ahmad	VLHR01	26	MS
5	Rehan	VISB01	23	BS
6	Rizwan	VRWP01	29	MS
7	Umer	VISB01	25	BS
8	Javed	VLHR01	26	MS

You are required to completely de-normalize the above table using “horizontal splitting” on the basis of Degree Program.

Question No. 2
Consider the following normalized tables for a telecommunication company showing the daily call record details of customers:

Customer Info
Customer_ID	Customer Phone No.	Balance
1	033XXXXX	300
2	033YYYYY	250
3	033ZZZZZZ	300
4	033AAAAA	1000
5	033BBBBB	80
6	033CCCCC	554

…
… …

Call record detail
Call_ID	Customer_ID	Dialled Phone Number	Duration	Call Charges
1	1	032ABCVD	1 minute	2 RS
2	1	032ABCVG	2 minutes	4 RS
3	1	032ABCVD	1 minute	2 RS
4	2	032ANNNN	3 minutes	6 RS
5	2	032AMMM	4 minutes	8 RS
6	3	033RRRRR	1 minute	2 RS

… … … … …

Due to certain performance factors company wants to de-normalize the tables using pre-joining technique.

Table Information is given below:

• Assume 1:4 record count ratio between customer Info (master) and Call record detail (detail).
• Assume 15 million customers.
• Assume 10 byte Customer_ID.
• Assume 50 byte header for customer Info (master) and 80 byte header for Call record detail (detail) tables.
You are required to perform the following tasks:

• Calculate the Total space in GBs used with normalization.
• Calculate the Total space in GBs used after de-normalization.

Deadline:
Your assignment must be uploaded on VULMS on or before June 17, 2020. While June 18, 2020 will be a bonus day for assignment submission. After the bonus day, no assignment would be entertained via email.

Solution file link

Question No. 2
Consider the following normalized tables for a telecommunication company showing the daily call record details of customers:

Customer Info

Customer_ID
Customer Phone No.
Balance

1
033XXXXX
300

2
033YYYYY
250

3
033ZZZZZZ
300

4
033AAAAA
1000

5
033BBBBB
80

6
033CCCCC
554

…
… …

Call record detail

Call_ID
Customer_ID
Dialled Phone Number
Duration
Call Charges

1
1
032ABCVD
1 minute
2 RS

2
1
032ABCVG
2 minutes
4 RS

3
1
032ABCVD
1 minute
2 RS

4
2
032ANNNN
3 minutes
6 RS

5
2
032AMMM
4 minutes
8 RS

6
3
033RRRRR
1 minute
2 RS

… … … … …
Due to certain performance factors company wants to de-normalize the tables using pre-joining technique.

Question No. 1
Consider the following table having the information of students of a university:

Student ID
Student Name
Campus ID
Student Age
Degree Program

1
Ali
VLHR01
27
MS

2
Kamran
VISB01
24
BS

3
Akmal
VRWP01
24
BS

4
Ahmad
VLHR01
26
MS

5
Rehan
VISB01
23
BS

6
Rizwan
VRWP01
29
MS

7
Umer
VISB01
25
BS

8
Javed
VLHR01
26
MS