选择列标头以便按位置排序。

Select the column head to sort by location.

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按位置和按名称传递参数。

Passing Arguments by Position and by Name.

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参数将按位置与语句或命令中的参数占位符匹配。

The statements or stored procedures in these commands can be defined with parameter placeholders.

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To start over, Press 0. What is your origin?

结束按0，你的位置在哪儿？

哈佛公开课 - 计算机科学课程节选