Presentation On Data Warehouse

Name : Nahian AhmedID: 151-15-5137.

Section – ‘G’

A producer wants to know….

Which are our lowest/highest margin

customers ?

Who are my customers and what products are they buying?

What is the most effective distribution

channel?

What product prom--otions have the biggest

impact on revenue? What impact will new products/services

have on revenue and margins?

Which customers are most likely to go to the competition ?

What is a Data Warehouse??• A data warehouse is an appliance for storing and analyzing data, and reporting. • Central database that includes information from several different sources.• Used to produce reports to assist in decision-making and management.

What is Data Warehousing?

A process of transforming data into information and making it available to users in a timely enough manner to make a difference

Data

Information

“Data Warehouse is a subject oriented, integrated, time-variant and non-volatile collection of data in support of management’s decision making process.” – W. H. Inmon

Data Warehouse

Subject Oriented

Integrated

Time Variant

Non-volatile

Data Processing Technologies• OLTP (on-line transaction processing)- The major task is to perform on-line

transaction and query processing. Covers most of the day-to-day operations of an organization.

• OLAP(On-Line Analytical Processing)- Serve knowledge workers(users) in the role of

data analysis and decision making.- Organize and present data in various formats

to accommodate the diverse needs of the different users.

Data Processing Technologies

OLTP OLAP

To summarize ...

OLTP Systems are used to “run” a business

The Data Warehouse helps to “optimize” the business