Using this information, we were able to calculate precise costs for the update.
通过这个信息,我们可以精确地计算出更新所需的成本。
Using this information, the DB2 Optimizer will determine the cost of using each index.
通过使用该信息,DB 2 Optimizer将会确定使用每个索引的代价。
What did he manage to pull out information-wise from using these two relationships? And actually to do this, he made a few more observations.
出于好几个原因,这件事情十分有趣,他从这两个关系中,试图找到什么信息呢?
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