Complicated query aggregation algorithms for multi-dimensional data
多维数据的复杂查询聚集算法研究

Complex inquiry to the spatial multi-dimensional data is the key point and the difficulty of the multi-dimensional data research. This article has made improvement in several aspects as the following: carry out the data piecemeal according to the grouping attribute value; carry out effective sorting to the integrated data; carry out the optimization in the accumulation function's application. It indicated that the improved algorithm can enhance the inquiry's efficiency greatly via analog data's experiment.