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The concept of data warehousing originated in 1988 with the work of IBM researchers Barry Devlin and Paul Murphy. The need to warehouse data evolved as computer systems became more complex and handled increasing amounts of data. Data Warehousing is the the electronic storage of a large amount of information by a business. Warehoused data must be stored in a manner that is secure, reliable, easy to retrieve and easy to manage.
Need For Data Warehouse
Data Integration
Advanced Reporting & Analysis
Knowledge Discovery and Decision Support
Performance
How Data Warehouse works?