This paper used algorithm of minimum spanning tree to realized multi-join queries of distributed database and provided analyzing method.
本文用最小生成树算法实现了分布式数据库中的多元连接查询，并进行了算法的分析与设计。
Use UPDATE STATISTICS HIGH if queries have a multi-column indexed defined on join columns or filter columns.
如果查询中有属于多列索引的连接列或过滤列，则使用UPDATESTATISTICSHIGH。
Use UPDATE STATISTICS HIGH if queries have a multi-column indexed defined on join columns or filter columns.
如果查询中有属于多列索引的连接列或过滤列，则使用UPDATESTATISTICSHIGH。
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