【摘要】 通过分析基于实化聚集视图的查询重写方法,将相关的查询计算理论与数据流的查询相结合,针对数据流的特征,给出了一种具有广泛应用前景的基于数据流的近似查询计算方案。更多还原

【Abstract】 We analyse the materialized aggregate viewsbased query rewriting computation,and the related theory of query computation is combined with the query of data streams in the paper.To the characteristic of data streams ,and of data warehousing is combined with the method of the fast approximate query computation,a kind of approximate query computation framework of data streams is given,which has wide application foreground.更多还原