What is the difference between a database and a data warehouse?

Question

What is the difference between a database and a data warehouse?

Aren\'t they the same thing, or at least written in the same thing (ie. Oracle RDBMS)?

Answer 1

Source for the Data warehouse can be cluster of Databases, because databases are used for Online Transaction process like keeping the current records..but in Data warehouse it stores historical data which are for Online analytical process.