The distributed data query is the core of the distributed database managing system, but the optimized query algorithm is the key technology in query processing.
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 this paper, we describe an algorithm, for query processing with semantic optimization in distributed relational database systems.
本文描述一个分布式关系数据库系统中具有语义优化的查询处理算法。
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。
The characteristics of distributed database are introduced in this paper, common used query optimization algorithms are provided are provided, and the method of selection algorithm is given.
介绍了分散式数据库的特点，详细阐述了常用的查询优化演算法的思想，分析了优缺点，给出了演算法选择的方法。
In this paper, based on a schema translation from Object-Oriented Database (OODB) to Relational Database (RDB), it proposes an algorithm for translating OODB query to RDB query.
文章基于从面向对象数据库(OODB)到关系数据库(rdb)的模式转换，提出了一种从面向对象数据库查询到关系数据库查询的转换算法。
Under the support of the conversion algorithm, users can query data with user-friendly interface in more XML database platform.
在该转换算法支持下，用户可以在更多的XML数据库平台下使用用户友好的查询界面进行数据查询。
By using reference time information stored in the query log database, the proposed algorithm improved the accuracy of Web usage clustering.
该算法利用服务器日志库中保存的网页访问次数信息，提高了聚类的客观性和准确性。
The distributed data query is the core of the distributed database managing system, but the optimized query algorithm is the key technology in query processing.
多级安全查询处理器是多级安全数据库的核心部分，它提供对安全级查询的支持。
A new method of tree scheme knowledge representation is proposed. It enables the recursive query process to consult the states of the extensional database, making the algorithm more efficient.
提出了一种树形知识表示方法，使递归查询可参考事实库状态，从而获得更高效的算法。
A new method of tree scheme knowledge representation is proposed. It enables the recursive query process to consult the states of the extensional database, making the algorithm more efficient.
提出了一种树形知识表示方法，使递归查询可参考事实库状态，从而获得更高效的算法。
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