数据分布是数据库查询并行处理的基础，良好的数据分布方法对查询性能有着重要影响。
Data declustering is the foundation of the parallel processing of database query, which has significant effect on query performance.
理论分析和试验结果表明本文提出的RCMD方法优于现有的数据分布方法，具有最好的查询处理性能。
In this paper, we propose a new data declustering method-RCMD, which is effective for all kinds of queries.
不过，报表应用程序应该不需要知道这种可通过联合方法提供的数据分布。
However, the reporting application should not need to be aware of this data distribution which can be provided through the federated approach.
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