The document defines a data warehouse as a subject-oriented, integrated, and time-variant collection of data used to support management decision making. It notes that while databases are transaction-oriented and store online data, data warehouses are designed to analyze historical data from across an entire organization. Data warehouses are used for reporting, analysis, and decision making, and may include departmental data marts that contain only relevant information. The document also references the architecture of a data warehouse but does not provide details.

1. 04/25/17 akkalbist55@gmail.com
Data warehouse
Akkal☻Bista

2. 04/25/17 akkalbist55@gmail.com
Definition
● Subject oriented
● Integrated
● Time-variant
● Non-volatile
Collection of data in support of
management decision making process.

3. 04/25/17 akkalbist55@gmail.com
Database vs Data Warehouse
Database Data Warehouse
● Transaction Oriented • Subject oriented
● For saving online bargain data • For saving historical data
● E-R modeling techniques are • Data modeling techniques are
● used for designing • used for designing.
● Capture data • Analyze data
● Constitute real time information • Constitute entire information

4. 04/25/17 akkalbist55@gmail.com
Uses
It is used for reporting, data analysis and
decision making .

5. 04/25/17 akkalbist55@gmail.com
Data Mart
A departmental data warehouse that store only
relevant data.

6. 04/25/17 akkalbist55@gmail.com
Architecture
Architecture of data warehouse

7. 04/25/17 akkalbist55@gmail.com
Architecture
Architecture of data warehouse