1. Week 11 – Data Warehouse
INFOSYS 222

2. Agenda Agenda Data Warehouse Star Schema
Practice on previous exam question

3. Data Warehouse and Star Schema
What is data warehouse?
How is it different from database?
How to implement a data warehouse?
What is a star schema?

4. 2010 INFOSYS 222 SC Exam
The supermarket chain wishes to use this information to answer queries about the purchases and would like the data sourced from this operational database to be fed into a data warehouse
Design a star schema for the data warehouse. The finest grain for time is one week

5. 2015 INFOSYS 222 S2 Exam
The company Northwind is interested to build an OLAP system to analyse the sales figures they have obtained over the last 3 years of daily operational data in the database as described by the data model in Figure 3. In particular, they are interested to know how the weekly sales are affected by factors like country of customer, employee, and shipper.
Draw a star schema of the data warehouse based on the information given.