The change detection for XML document can be very useful to data storage of XML DW, pattern abstracting of document and incremental query evaluation.
XML文档的变化检测可以广泛应用于构建XML数据仓库中的数据存储、文档模式提取以及增量查询等方面。
According to the practical context, this thesis raises a kind of hybrid data cube model and its query and incremental update algorithm.
另外根据实际应用背景，提出了一种混合数据立方体模型，并给出了其相应的查询和增量更新算法。
Moreover the paper studied and summarized the continuous query technique on the base of sliding Windows, and analyzed and compared the strategy of processing non-incremental update operator.
研究和总结了基于滑动窗口的连续查询技术，对不能增量更新的操作处理策略进行了分析和比较。
A performance test shows the efficiency of database query is improved by the incremental database engine.
性能测试的实验结果说明了这种数据库引擎的使用能够有效地提高数据库查询的效率。
A performance test shows the efficiency of database query is improved by the incremental database engine.
性能测试的实验结果说明了这种数据库引擎的使用能够有效地提高数据库查询的效率。
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