215 search results - page 25 / 43 » A Bi-Temporal Data Warehouse Model |
IEEEARES
2008
IEEE
14 years 3 months ago
2008
IEEE
—Data warehouse (DW) systems integrate data from heterogeneous sources and are used by decision makers to analyze the status and the development of an organization. Traditionally...
DAWAK
2005
Springer
14 years 2 months ago
2005
Springer
The queries defined on data warehouses are complex and use several join operations that induce an expensive computational cost. This cost becomes even more prohibitive when querie...
DAWAK
2007
Springer
14 years 2 months ago
2007
Springer
In this paper, we deal with the problem of performing what-if analysis for changes that occur in the schema/structure of the data warehouse We abstract software modules, queries, r...
DEXA
2009
Springer
14 years 3 months ago
2009
Springer
Dimension hierarchies represent a substantial part of the data warehouse model. Indeed they allow decision makers to examine data at different levels of detail with On-Line Analyt...
ICCSA
2009
Springer
14 years 3 months ago
2009
Springer
Data aggregation in Geographic Information Systems (GIS) is a desirable feature, spatial data are integrated in OLAP engines for this purpose. However, the development and operatio...