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.
相反，可使用具有where子句的虚拟表，或者将连接作为数据源的视图进行定义，并在这一视图中执行规则。
Instead, use a virtual table with a WHERE clause, or define the join as a view in the data source, and execute the rule on this view.
如果您想将定义远程视图的查询下推到数据源，那么定义远程视图的昵称会比较有用。
Defining a nickname over a remote view is useful in cases where you want to push down the query defining the remote view to the data source.
基于单一数据源的思想，采用面向对象的建模方法，定义了BOM对象模型和BOM对象的主要视图类型及其关键属性。
The object oriented modeling method is used to define a BOM object, the main views of the BOM object and the key attributes of the BOM object.
通过定义不同数据源更新之间的并发依赖关系和同源依赖关系，利用概念化事务模型可实现松散耦合环境中视图的并发维护。
The view maintenance process in the loosely coupled environment was implemented as a conceptual transaction, by the definitions of concurrency dependency and same-source dependency.
通过定义不同数据源更新之间的并发依赖关系和同源依赖关系，利用概念化事务模型可实现松散耦合环境中视图的并发维护。
The view maintenance process in the loosely coupled environment was implemented as a conceptual transaction, by the definitions of concurrency dependency and same-source dependency.
应用推荐