通过我的查询 » Through my query 停止用小汽车是很难的事 » Stopping cars is a very difficult thing 无论持有现股还是持有期权，通过实证分析都验证了我国上市公...
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在这个两部分系列的第一期中，我重点介绍了通过将索引添加到DB 2数据库来减少查询次数的优势和缺点。
In the first installment of this two-part column, I focused on the pros and cons of reducing query times by adding indexes to a DB2 database.
通过内部统计数据，我指的是系统目录中的统计数据，优化器可以确定最低成本的查询执行计划。
By internal statistics, I mean the statistics in the system catalogs that the optimizer USES to determine the lowest-cost query execution plan.
通过分析数据包，我能够识别之前并没有注意的错误代码，并且能够指出这个错误及导致发生问题的查询。
By drilling down into the packets, I could identify a problem with the code I hadn't previously noticed and identify both the error and the query that triggered the problem.
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