【摘要】 在分布式数据库中,查询处理的主要矛盾在于由数据的分布与冗余所引起的场所间的数据传递及通信费用太高.如果能利用数据分布与冗余的这一特性,来提高数据查询算法的并发处理能力,就可以缩短查询处理的响应时间和提高处理速度.因此本文提出一种新的带碎片的分布式查询处理方法,将其应用在大型实验室管理系统中,可以提高系统的查询处理效率和缩短响应时间.更多还原

【Abstract】 In the distributed database, owing to the distributed and redundancy of data, data transmission and communicating fee between sites in deal with inquiry become the main contradiction in the inquiry about distributed database. But if we can use this characteristics of distributed database to increase the ability of parallel processing in inquiry algorithms, we can shorten the response time of queries and improve the speed of inquiry. This paper puts forward a new algorithm of inquiring about the distributed with fragments, which was used in the large laboratory management system. It may improve the query efficiency and shorten the response time of the system.更多还原