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.
后来通过查询，我才了解了其中的奥秘。
Later when I inquired into it, I came to know about the secret in it.
在保存了一个比赛之后，我当然可以通过SimpleDB 的查询语言（与SQL很像）搜索它。
Now that I've got a race saved, I can, of course, search for it via SimpleDB's query language, which looks a lot like SQL.
我将通过互联网查询和自己的人脉关系网络对你有一个预先的了解和判断。
I'll search for you on the web and often use my own personal network to do a pre-interview reference check.
那么让我来告诉你吧，其实你真正的问题在于没有重复利用查询，你可以通过一些办法来标记这些查询。
Let me tell you that your real problem is that queries aren't reused, which you have several ways to spot.
我能够单元测试通过运行我的函数加载hbm映射文件查询，添加参数和执行查询。
I am able to unit test my mapping files by running my function that loads the HBM query, adds parameters and executes the query.
我能通过什么网站可以查询签证的进度。
我能通过什么网站可以查询签证的进度。
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