Many methods and their applications are studied in the paper based on DataWindow and multi-relation combination query method is designed based on DataWindow.
主要研究基于数据窗口函数查询的多种方法及应用，并设计了基于数据窗口的多关系组合查询方法。
Many methods and their applications are studied in the paper based on DataWindow and multi-relation combination query method is designed based on DataWindow.
主要研究基于数据窗口函数查询的多种方法及应用，并设计了基于数据窗口的多关系组合查询方法。
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