试题与答案

在Visual FoxPro中,以下关于视图描述中错误的是A.通过视图可以对表进行查

题型:单项选择题

题目:

在Visual FoxPro中,以下关于视图描述中错误的是

A.通过视图可以对表进行查询

B.通过视图可以对表进行更新

C.视图是一个虚表

D.视图就是一种查询

答案:

参考答案:D

解析: 视图是根据表定义的,是一种虚拟表。视图兼有“表”和“查询”的特点,与查询类似的地方是,可以用来从一个或多个相关联的表中提取有用信息,但它并不是一个查询文件;与表相类似的地方是,可以用来更新其中的信息,并将更新结果永久保存在磁盘上。

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