【摘要】 分布式数据库中,数据的分散存放和冗余给故障恢复带来了方便,同时也使得分布式查询处理变得更加复杂,因此如何快速准确地查询用户想要的数据成了分布式数据库系统中的一个重要问题。文章介绍了分布式数据库的特点,详细阐述了一般的查询优化策略,给出了常用的查询优化技术。更多还原

【Abstract】 Distributed databases, data storage and redundancy scattered to recovery brings convenience, but also enables distributed query processing becomes more complex, so how to query fastly and accurately become an important issue. This paper describes the characteristics of distributed database in detail and the general query optimization strategy, given the commonly used query optimization technology.更多还原