异构数据库集成中间件的设计与实现 关键词：异构数据库集成；XML；中间件；数据库连接池 [gap=1085]Key words：heterogeneous database integration；XML；middleware；database connection pool
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Heterogeneous database semantic integration 异构数据库语义集成
Data warehousing is also very useful from the point of view of heterogeneous database integration.
从异种数据库集成的角度看，数据仓库也是十分有用的。
Decomposition and optimization of global query is one of hard problems in heterogeneous database integration.
全局查询的分解与优化是异构数据库的集成中许多难题之一。
Data warehousing provides an interesting alternative to the traditional approach of heterogeneous database integration described above.
对于异种数据库集成的传统方法，数据仓库提供了一个有趣的替代方案。
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