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。
While Process application of the distribute database, fast and exact get the query result has been the key problem about distribute database.
在进行分布式数据库应用时，快速而准确的得到查询结果一直是分布式数据库得以应用的关键问题。
The distribute data query is the core of the distribute database manages system, but the optimized query algorithm is the key technology in query the processed.
分布式数据查询是分布式数据库管理系统的核心，而查询优化算法又是查询处理中的关键技术。
In processing of distribute data query, the join operation is the kind of the most in common use, time-consuming, higher price, and also is the key factor of the query efficiency for affect.
在分布式数据查询处理中，连接操作是最常用的、费时的而且代价较高的一种操作，也是影响查询效率的关键因素。
In processing of the distribute data query, the join operation is the kind of the most in common use, time-consuming and a higher price, also is the key factor of the query efficiency for affect.
在分布式数据查询处理中，连接操作是最常用的、费时的而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。
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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