【摘要】 提出了一种数据流上未来值的连续查询 ,称为连续预测查询 采用数理统计的方法给出了带有COUNT聚集函数的连续预测聚集查询实现算法 通过采用TPC H标准测试数据和随机生成的模拟数据进行了实验 理论和实验结果表明 ,给出的带有COUNT的连续预测聚集查询实现算法具有很高的性能和精度更多还原

【Abstract】 Predictive continuous aggregate queries over data streams are proposed in this paper Models and algorithms for predicting the aggregate value, such as count, over data streams based on recent data are given using statistics Extensive experimental studies based on real benchmark data and synthetic data are carried out to demonstrate the accuracy of the techniques Analysis and experimental results show that the techniques in terms of statistics could obtain better accuracy of prediction of aggregate values over data streams in the future更多还原