Query optimization technology in DB2 9.7 provides increased efficiency for processing queries against relational views of XML data.
DB 2 9.7中的查询优化技术能够提高针对XML数据的关系视图的查询处理效率。
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。
The focus of my article introduce the flow of data query and the technology of Mediator, Wrapper, Metadata in management Layer.
本文重点介绍了数据查询流程以及管理层中使用的中介器、包装器、元数据等核心技术。
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