DB 2优化程序使用这些特征和限制来确定处理一个查询的最佳方法。
The DB2 optimizer USES these characteristics and restrictions when determining the best way to process a query.
为了解决那个问题，OODT提供了对分布式资源的透明访问、数据恢复和查询优化功能以及分布式处理和虚拟存档。
To solve that problem, OODT provides transparent access to distributed resources, functionality for data discovery and query optimization, as well as distributed processing and virtual archives.
用于处理具有改进查询执行技术的查询复杂性、数据量和及时期望的查询优化。
Query optimizations to address query complexity, data volumes, and timeliness expectations with improved query execution techniques.
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