It is the database which the data of the basic business processing system system (the operational data), in order to utilize with another purpose such as search it extracts from there, keeps the data temporarily.

Information is utilized originally, about the fact that the data of the business system which differs integrated was lectured to purpose. Extraction converting & integrating the heterogeneous data of the business system which differs according to purpose, by the fact that it installs the single database, "real time analysis of" present shipment circumstance "customer" and so on becomes possible.

In addition, the case where from the business systemthe data is loaded to the data warehouse it is said that it is effective, as a intermediate database. As a difference with the data warehouse, it has volatility, real time housing of the data, possession only of the detailed data and data possession of short term (1 - 2 months) with is a feature which was said e.g., (several minutes - renewal is permitted at interval of several hours)