In a nutshell, a data warehouse is a “repository for historical data, used to make decision”. Of course there’s much more to it than that.
Data warehousing is a concept. It is a set of hardware and software components that can be used to better analyze the massive amounts of data that companies are accumulating to make better business decisions. Data Warehousing is not just data in the data warehouse, but also the architecture and tools to collect, query, analyze and present information. Read more