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.

1. Presentation On
Data Warehouse
Name : Nahian Ahmed
ID: 151-15-5137.
Section – ‘G’

2. 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 ?

3. 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.

4. 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

5. “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

6. 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

7. To summarize ...
 OLTP Systems are
used to “run” a business
 The Data Warehouse helps
to “optimize” the business