咱们停下来问问路吧。
我们迷路了，我要去问问路。
你们应该两人一组去问路。
想象一下，当一位游客走近你问路时，你正在当地的城市公园里散步。
Imagine that you are taking a walk in your local city park when a tourist approaches you asking for directions.
不同之处在于硬件，也就是电脑接受司机问路的方式和显示驾驶指令的方式。
The differences come in hardware—the way the computer accepts the driver's request for directions and the way it presents the driving instructions.
最重要的是，问路时要有礼貌。
这里有一些关于如何在国外问路的建议。
Here is some advice on how to ask the way in a foreign country.
我有点迷路了，不得不向一个陌生人问路，但我还是走到了这里。
I got a bit lost and I had to ask a stranger, but I got here eventually.
我故意拔掉主机与交换机之间的一根 FC电缆，从而中断其中一条访问路径。
I purposely interrupt one of the access paths by pulling off an FC cable between the host and switch.
也不要在街上随便找个陌生人问路。
我走到警察跟前向他问路。
我问路上的人，芜湖有几个医院？
I asked the pedestrians how may hospitals there were in Wuhu.
我想你应该向别人问问路。
我们可以到问讯处去问路。
查询的访问路径：如何访问这些表？
索引设计对访问路径选择至关重要。
Index design has a critical impact on access path selection.
从而，它能提升可能的访问路径。
回到美国，迷路时我总是打手机向朋友问路。
Back in the US, whenever I got lost, I would always call a friend for directions on my cell phone.
“我可以向他问路，”她想。
“我可以向他问路，”她想。
描述访问路径最容易的方法是使用示例。
The easiest way to describe access paths is to use an example.
sql语句本身也会影响访问路径选择。
The SQL statement itself also impacts the access path selection.
新需求将不得不问路它方。
拿好这张纸，问路去。
有时候我们只好打消了问路的念头继续赶路。
请记住，优化器使用编目数据决定访问路径。
Keep in mind that this catalog data is what the optimizer USES to make access path decisions.
它高效，因为索引适合于最佳访问路径的选择。
It is efficient, as the indexes qualify for the choice of excellent access paths.
选择访问路径：DB 2做出什么决策？为什么？
如图1所示，DB 2优化器选择最佳访问路径。
As shown in Figure 1, the DB2 optimizer chooses the best access path.
她说我是个诗人，然后问路者便满脸鄙夷地掉头离开。
She said I was a poet and my questioner turned away contemptuously.
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