DB 2优化器使用目录统计信息来确定最佳的访问路径,而更新这些目录统计信息所采用的主要方法就是运行RUNSTATS实用程序。
The DB2 optimizer USES catalog statistics to determine the best access path, and the main method employed to update these catalog statistics is to run the RUNSTATS utility.
但是,现在缺乏关于这些方法实际工作的证据-因此在哪一条路径是最佳途径上没有达成共识。
There is, however, a shortage of evidence regarding which approaches will actually work - and therefore no consensus on which path is best to follow.
实现此目标的最佳方法是,找到给定站点与稳定的可理解的站点之间的最短路径。
The best way to do that is to find the shortest path between the site you are given and one that is stable and understandable.
该方法是根据图像相邻像素灰度值之间的内在关系求出扫描图像像素的最佳路径。
In the method that reflects autocorrelation of image, the optimal path of scanning image is acquired by inherent coherence and relationship among near pixels of image.
该方法首先根据地形和出材量等数据计算出各路径的费用——收益比,然后用动态规划法求出最佳线路。
First, we calculate the ratio of the cost to benefit of each square which fits the grade required, after which, we use dynamic program to select the optimal result.
该方法首先根据地形和出材量等数据计算出各路径的费用——收益比,然后用动态规划法求出最佳线路。
First, we calculate the ratio of the cost to benefit of each square which fits the grade required, after which, we use dynamic program to select the optimal result.
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