... Brilliance Data Extract 数据抽取 extract data 删除兑现 Extract Data from the Recordset 从数据集中提取数据 ...
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XQuery的设计目标是从可能非常大的XML数据集中提取数据。
XQuery was designed for extracting data from potentially very large XML datasets.
像SQL一样，XQuery包含从多个数据集中提取数据、汇总数据、聚合数据和连接数据的函数。
Like SQL, XQuery contains functions for extracting, summarizing, aggregating, and joining data from multiple datasets.
数据通常存储在很多个不同的数据存储系统中，从所有源中提取数据并将其合并到单个一致的数据集中确实有一定的难度。
Data is typically stored in many different data storage systems, and extracting data from all sources and merging the data into a single, consistent dataset is challenging.
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