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I was asked by a customer what the term “data warehouse” really means.
I thought about ETL, details of the data model, differences to NoSQL, Clouds, ‘normal’ DBMS, MDM (Master Data Management) etc. but wasn’t able to describe the term in a few words to him… (In fact I did some talking and left him un-illuminated.)
How can “data warehouse” described in 1-3 (or a bit more) sentences?
A non-technical definition would be:
Huge ammount of data stored in a specialized computer system. Data is usually related to some specific domain and whole system is designed to be fast and optimized for some special tasks. Data stored in data warehouses are mostly used for analysis or in decision making processes.