BIS 445 DeVry Week 2 iLab
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<strong>BIS</strong> <strong>445</strong> <strong>DeVry</strong> <strong>Week</strong> 2 I Lab<br />
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<strong>BIS</strong> <strong>445</strong> <strong>DeVry</strong> <strong>Week</strong> 2 I Lab<br />
<strong>BIS</strong><strong>445</strong><br />
<strong>BIS</strong> <strong>445</strong> <strong>DeVry</strong> <strong>Week</strong> 2 I Lab<br />
Create a data warehouse using a star schema and then analyze data warehouse information.<br />
Note! Submit your assignment to the Dropbox located on the silver tab at the top of this page. (See the Syllabus section<br />
"Due Dates for Assignments & Exams" for due dates.)<br />
Remember This! Connect to the I Lab here.<br />
I LAB OVERVIEW<br />
Scenario and Summary<br />
You will start with a comma delimited file that looks like this:<br />
When you are finished moving the data into the data warehouse, you will have split the customer, order, and product<br />
information into their own tables and, as a result, create a star schema that looks like this:<br />
As you can see, the Fact Orders table has become a fact table containing statistics we might want to analyze as<br />
managers of a company. The fact table contains the primary keys of the other tables as foreign keys. Also in the fact<br />
table (Fact Orders), we have stored the result of Price*Quantity in a newly created column called Sales Total. Sales<br />
Total is a fact we would like to analyze using an OLAP tool, such as a pivot table, in the future.<br />
The primary key of the Fact Orders table is a Surrogate Key which has been generated by the database management<br />
system.<br />
In the star schema, the products and customers table have become dimension tables. Furthermore, the star schema<br />
removes the duplicated customer and product names that existed in the original comma delimited file and puts them in<br />
normalized customer and product tables.<br />
Last of all, the star schema violates the third normal form, which says that no calculated fields should exist in the design<br />
(schema). In this case, the Sales Total column is a calculated field.<br />
This violation isn't a problem because in a Decision Support System, software that accesses a data warehouse, it is<br />
acceptable to violate normal forms if it speeds up SQL queries by minimizing table joins and storing calculations in the<br />
database.<br />
Your task is to create a star schema that is capable of holding the information in the comma delimited file, and then<br />
load the star schema with the data from the text file. You will load the comma delimited data file into a temporary table<br />
in the SQL database. After you design the star schema, you will use SQL statements to populate the star schema with<br />
the necessary data from the temporary table. Finally, you will analyze the data by order year in order to find out which<br />
customers have the highest to lowest sales.
Deliverables<br />
Submit the YourName_Lab2_Questions.docx to the <strong>Week</strong> 2 I Lab Dropbox.