A STUDY OF HEALTH DATA WAREHOUSING AND HEALTH DATA WAREHOUSING PROCESS

Abstract

The purpose of a data warehouse is to extract data from operational systems and transform it into  formats suitable for data analysis. Supposed to operational systems in which data is deleted when it is no longer needed by a particular application, data warehouses retain data over time. It is the non-volatility of the data that makes historical analysis possible. As opposed to operational systems which store the most recent version of the data, data warehouses keep track of it, including a history of the changes that took place. Time-variance enables trends analysis is over time. Finally, the purpose of the data is to improve management by gaining a better understanding of the enterprise .