Algorithms of estimating the sizes of query results of selection operations and join operations are designed, and corresponding experiments are implemented, and a clue of further research is given.
设计了用直方图估计选择运算与连接运算结果大小的算法,进行了相应的实验,并提出下一步工作的思路。
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This paper mainly presents hardware selection, its characteristics and programming clue of th…