查询数据源 meaning in English

query data source

For each paging operation , the data control queries the data source for the entire data collection and selects the row or rows to display , discarding the remaining data
对于每个分页操作，数据控件查询数据源的整个数据集并选择要显示的行，并放弃其余的数据。
You do have to know how to query a data source , but you do not have to know rdl or how reporting services stores reports and resources in order to use report designer
若要使用报表设计器，您必须了解如何查询数据源，但不用了解rdl或reporting services存储报表和资源的方式。
If relevant , then checks whether it is concurrent incremental maintainable or self - maintainable . if the update satisfies self - maintenance , our mechanism queries auxiliary views ( instead of querying iss ) to avoid network transmission and make the materialized view consistent with underlying iss . the update which needs to maintain the view concurrently and incrementally can be handled by polec
当收到更新后， pmdvm方法首先用相关性对其检查，对不相关更新直接抛弃；对相关更新对其进行并发增量视图维护或自维护机制检查，对满足自维护的更新通过查询辅助视图（而不是查询数据源）来避兔网络传输和使实化视图与底层的数据源保持一致，对必须进行并发增量视图维护的更新由polec来处理。