Considering the characteristics of the star-schema, this paper compresses the sorting keywords to lessen the cost of transfer and the expense of sorting, adopts the distributed aggregation operation method to reduce the number of groups which need to transfer and create complete aggregation result in request site. This work will greatly reduce the cost of data processing and the cost of data transmission between sites, thereby increase the efficiency of aggregation query of the distributed data warehouse.
|Number of pages||3|
|Journal||Jisuanji Gongcheng/Computer Engineering|
|State||Published - Feb 20 2006|
- Aggregation query
- Distributed data warehouse
- Star schema