DefinePK

Abstract

Data Warehouse (DW) offers static structured multidimensional schemas at logical level, which does not has the ability to manage the changes that the data warehouse schema undergoes over time in response to evolving business requirements. Although multiple versions of data warehouse and use of multi-version query language is suggested for handling such problems, yet managing large number of DW versions makes queries construction more complex and unmanageable task. In this study we have developed a transparent-retrieval-method using query-confinement method for managing multiple versions of a DW.