在检索总行数的方式上，数据源和数据源视图控件的内部实现不同。

Data source and data source view controls differ in their internal implementation for how to retrieve total row counts.

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昵称是在联邦数据库内创建的，用于标识数据源表和视图。

Nicknames are created in the federated database to identify data source tables and views.

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通过昵称，还可以定义引用来自多个数据源的数据的视图。

Using nicknames, you can also define a view that references data from multiple data sources.

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