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A METHOD OF OPTIMIZING SQL QUERY AND OPTIMIZER
A METHOD OF OPTIMIZING SQL QUERY AND OPTIMIZER
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机译:SQL查询和优化器的一种优化方法
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摘要
extracting one or more bind values from an inputted SQL query statement; calculating selectivity and correlation coefficient for the bind values; acquiring an execution plan based on the selectivity and the correlation coefficient. Through the embodiments of the present invention, the SQL query can be optimized to a higher degree and the overall query execution time can be reduced.
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