Complicated query aggregation algorithms for multi-dimensional data

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.