The distribute data query is the core of the distribute database manages system, but the optimized query algorithm is the key technology in query the processed.
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 distribute data query is the core of the distribute database manages system, but the optimized query algorithm is the key technology in query the processed.
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。
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