在清单6中，从根据计数器作为初始步骤的动态sql快照数据中，您可以从总体成本、频率和每次调用成本角度列出最优sql语句。
From dynamic SQL snapshot data as the initial step based on the counters in Listing 6, you should be able to list out the top SQL statements in terms of total cost, frequency, and cost per invocation.
简单的特征频率计数器，但为什么不计数发生在实时？
Simple character frequency counter, but why won't the count happen in realtime?
介绍了双计数器多周期同步法频率测量原理，给出了用单片机实现的具体实现方案。
The paper introduces the principle of frequency measure based on double-counter and multi-periods pulse synchronization method, and the designing with microprocessor is offered.
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