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Assignment No. 2
Semester Fall 2015
The assignment has been designed to develop your ability to design star schema and to estimate the rows in fact table.
Please read the following instructions carefully before solving & submitting assignment:
For any query about the assignment, contact only at CS614@vu.edu.pk
Do not post queries related to assignment on MDB.
Question 1 [15 Marks]
The Future Tech College has to design a star schema related to the grades for courses completed by the students. The tables with the attributes are as given below.
You have to;
You may use the MS Vision or any other similar tool to draw the Star Schema.
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kya ajeeb tamasha hy....pata nai question kahan sy aaty hein
Estimating the Size of Dimension of Fact Tables
Categorise dimension tables into small, medium, and large, based on how many rows in the dimension. Up to 1000 rows is small, 1000 to 100k is medium, and > 100k rows is large dimension. For example:
Country dimension: small
Customer dimension: large
Currency dimension: small
Date dimension: small
Salesperson dimension: small
Product dimension: large
Industry Sector dimension: small
Store dimension: medium
We can roughly estimate the size of a small/medium/large dimension based on the KB per row, like this:
Small: 1 KB/row x 1000 rows = 1 MB
Medium: 5 KB/row x 100k rows = 500 MB
Large: 10 KB/row x 1m rows = 10 GB
Then we multiply with the number of dimensions for each of the Small/Medium/Large category, like this:
Small: 11 tables x 1 MB = 11 MB
Medium: 6 tables x 500 MB = 3 GB
Large: 4 tables x 10 GB = 40 GB
Total: 44 GB
size of rows nai btana number of size btana hai i
is ko ms visio main kr na hn
Ji Visio me bhe bana sakti hain or MS word me bhe jisme aoko asan lagay.
ap file share kr de plz
ap file share kre plz
KOi please solution post kare