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What is data warehouse? What is its use in BI applications?

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BI applications often use data gathered from a data warehouse. What is data warehouse? What is its use in BI applications? What is the distinction between a data warehouse and an operational (or transactional) database? What kind of data is stored in operational databases vs. data stored in a data warehouse?;In your own words please.

 

Paper#19191 | Written in 18-Jul-2015

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