Enable multi-column menu 启用多列菜单
These enable your applications to update individual column values, or to scroll through result sets backward or forward.
这些方法使您的应用程序可以更新单个的列值，或者前后滚动结果集。
In this column, I'll show you the basics of adding assertions to your code, demonstrating a couple of different ways to enable and disable them for optimum code testing and performance.
在本专栏文章中，通过演示两种不同的方式来启用和禁用断言以便优化代码测试和性能，我将向您讲述一些有关向代码中添加断言的基本知识。
Use the column print and NOPRINT options to enable and disable printing a particular column in the report.
使用列print和NOPRINT选项允许或禁止在报表中打印某个特定的列。
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