But the acronym missed the point that the data don’t need to be permanently transformed for analysis. On a contrary, the data warehouse was created to analyze specific data for certain purposes, and the data was converted to specific formats, with the original data essentially destroyed in the process. But don’t consider a data makes the data warehouse obsolete. Big data systems work with unstructured data as it comes, but the kind of query results you get not similar to the sophistication of data warehouse. Big data allows analyzing more data from various sources but at less resolution.