There is no one best method to learn a language. Find something that is effective for you. And above all, experiment!
学习一种语言没有最好的办法,你只需要找到对于你来说更有效的,重要的是,要去尝试!
The optimizer will compare the cost of each method to determine the best one to use.
优化器将比较每种方法的成本,确定使用最好的一种。
The optimizer calculates and compares the costs of each join method and selects the best one to use when evaluating query execution plans.
当评估查询执行计划时,优化器计算并比较每种连接方法的成本,然后选择要使用的最佳方法。
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