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What is a data warehouse? What does the term big data mean? 175 words

What is a data warehouse? What does the term big data mean? 175 words

Math   Statistics-And-Probability   
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Data Warehouse :- it is a collection of information and data , which is gathered from operational systems and many other external data sources. A data warehouse play very important role to support business decisions by allowing data consolidation, analysis and reporting at different aggregate levels.Technically data is populated into the Data warehouse through extraction, transformation and loading.

Big data: A large volume of structured, semi-structured and unstructured data that has the potential to be mined for information.and by using those information  we can make analysis to spot trends and insights that help create value and innovation much faster than conventional methods.

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