To illustrate the asynchronousquery pattern, I implement a simple example Web service that has absolutely no practical value beyond illustrating the concepts of the pattern.
为了说明异步请求模式,我实现了一个简单的示例Web服务,它除了说明这一模式的概念外无任何实际意义。
3
Queries that involve both local tables and remote (nickname) data are candidates for execution plans that allow concurrent and asynchronous execution of local and multiple remote query fragments.