Data Warehouse-Nonvolatile A physically separate store of data transformed from the operational environment Operational update of data does not occur in the data warehouse environment Does not require transaction processing, recovery, and concurrency control mechanisms Requires only two operations in data accessing initial loading of data and access of data8 Data Warehouse—Nonvolatile ◼ A physically separate store of data transformed from the operational environment ◼ Operational update of data does not occur in the data warehouse environment ◼ Does not require transaction processing, recovery, and concurrency control mechanisms ◼ Requires only two operations in data accessing: ◼ initial loading of data and access of data