By leveraging advanced query processing capabilities, the federation server can optimally distribute the workload among the federation server itself and the various sources.
通过利用高级查询处理功能，联合服务器可以在联合服务器本身和各个源之间最优地分布工作负载。
For distribute database query, join operation is the kind of the most common use with time-consuming and higher price and also it is the key confluence factor of the query efficiency.
在分布式数据库查询处理中，连接操作是最常用的、费时的且代价较高的一种操作，也是影响查询效率的关键因素。
For distribute database query, join operation is the kind of the most common use with time-consuming and higher price and also it is the key confluence factor of the query efficiency.
在分布式数据库查询处理中，连接操作是最常用的、费时的且代价较高的一种操作，也是影响查询效率的关键因素。
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