Anybody can describe?

The existence of aggregate tables does not help user queries. Users must access the summary tables, ideally automatically with awareness built into the BI tool or the RDBMS to force the query to be processed in the most efficient way. In recent years, BI vendors have debated if aggregate awareness belongs in the BI tool or in the RDBMS. Business Objects is the only BI tool that has built-in functionality to take advantage of RDBMS aggregate tables in a way that is seamless to users.

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SOLVED How aggregates awareness helps the users?

CS614 - Data Warehousing

zaasmi Cyberian's Gold last edited by

Anybody can describe?
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The existence of aggregate tables does not help user queries. Users must access the summary tables, ideally automatically with awareness built into the BI tool or the RDBMS to force the query to be processed in the most efficient way. In recent years, BI vendors have debated if aggregate awareness belongs in the BI tool or in the RDBMS. Business Objects is the only BI tool that has built-in functionality to take advantage of RDBMS aggregate tables in a way that is seamless to users.
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CS614 Assignment 3 Solution and Discussion
CS614 - Data Warehousing • cs614 assignment 3 solution discussion spring 2020 • • zareen

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Please share your idea solution
CS614 Assignment No.2 Solution and Discussion
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@zareen said in CS614 Assignment No.2 Solution and Discussion:

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

Solution:
With normalization:
Total space used = 15 x 50 + 60 x 80 = 5.55 GB

After de-normalization:
Total space used = (80 + 50 – 10) x 60 = 7.2 GB
CS614 GDB 1 Solution and Discussion
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SOLVED CS614 Assignment No.3 Solution and Discussion
CS614 - Data Warehousing • cs614 assignment no.3 solution discussion • • zaasmi

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Answer will be same after convert.

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SOLVED CS614 Quiz No. 2 Solution and Discussion
CS614 - Data Warehousing • cs614 quiz.2 solution • • zaasmi

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1_ As per Bill Inmost, a data warehouse, in contrast with classical applications is:

Data driven _ pg285

2_ Which of the following is NOT one of the three parallel tracks in Kimball’s approach?
Lifecycle Maintenance track

3_ Bill Inmon argues that requirements are well understood only after
Data warehouse is populated _ pg285

4_ Goal driven approach of data warehouse development was result of ______ work
Böhnlein and Ulbrich-vom _ pg285

5_ Identify the TRUE statement:
Clustering is unsupervised learning and classification is supervised learning _ pg 270

6_ Normally the term “DWH face to the business user” refers to:
Lifecycle Analytical Applications track _ pg 306

7_ In ________learning you don’t know the number of clusters and no idea about their attributes.
Unsupervised learning
https://www.cs.uic.edu/~liub/teach/cs583-fall-05/CS583-unsupervised-learning.ppt

8_ Waterfall model is appropriate when
Requirements are clearly defined _ pg 284

9_ Implementation of a data warehouse requires ________ activities.
none of above

10_ Normally the input data structure (a database table) for a data mining algorithm:
Has more number of records than attributes (not sure)
F

CS614 Assignment 2 Solution and Discussion Spring 2020
CS614 - Data Warehousing • assignment 2 cs614 discussion solution spring 2020 • • Faaizaa

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@Faaizaa said in CS614 Assignment 2 Solution and Discussion Spring 2020:

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
M

SOLVED CS614 Assignment 1 Solution and Discussion
CS614 - Data Warehousing • cs614 assignment 1 solution discussion spring 2020 • • moaaz

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CS614 ASSIGNEMNT NO 01 Solution
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CS614 assignment Solution spring 2020.xlsx
CS614 Assignment 3 Solution and Discussion
CS614 - Data Warehousing • cs614 assignment 3 solution discussion fall 2019 • • zareen

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SOLVED How aggregates awareness helps the users?

CS614 Assignment 3 Solution and Discussion CS614 - Data Warehousing • cs614 assignment 3 solution discussion spring 2020 • • zareen

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CS614 GDB 1 Solution and Discussion CS614 - Data Warehousing • cs614 gdb 1 solution discussion fall 2019 • • zareen

SOLVED CS614 Assignment No.3 Solution and Discussion CS614 - Data Warehousing • cs614 assignment no.3 solution discussion • • zaasmi

SOLVED CS614 Quiz No. 2 Solution and Discussion CS614 - Data Warehousing • cs614 quiz.2 solution • • zaasmi

CS614 Assignment 2 Solution and Discussion Spring 2020 CS614 - Data Warehousing • assignment 2 cs614 discussion solution spring 2020 • • Faaizaa

SOLVED CS614 Assignment 1 Solution and Discussion CS614 - Data Warehousing • cs614 assignment 1 solution discussion spring 2020 • • moaaz

CS614 Assignment 3 Solution and Discussion CS614 - Data Warehousing • cs614 assignment 3 solution discussion fall 2019 • • zareen

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CS614 Assignment 3 Solution and Discussion
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CS614 Assignment No.2 Solution and Discussion
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CS614 GDB 1 Solution and Discussion
CS614 - Data Warehousing • cs614 gdb 1 solution discussion fall 2019 • • zareen

SOLVED CS614 Assignment No.3 Solution and Discussion
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SOLVED CS614 Quiz No. 2 Solution and Discussion
CS614 - Data Warehousing • cs614 quiz.2 solution • • zaasmi

CS614 Assignment 2 Solution and Discussion Spring 2020
CS614 - Data Warehousing • assignment 2 cs614 discussion solution spring 2020 • • Faaizaa

SOLVED CS614 Assignment 1 Solution and Discussion
CS614 - Data Warehousing • cs614 assignment 1 solution discussion spring 2020 • • moaaz

CS614 Assignment 3 Solution and Discussion
CS614 - Data Warehousing • cs614 assignment 3 solution discussion fall 2019 • • zareen