【单选题】【消耗次数：1】
关于视图的说法，正确的是（ ）。
①
视图与基本表一样，也存储数据
②
对视图的操作最终都转换为对基本表的操作
③
视图的数据源只能是基本表
④
所有视图都可以实现对数据的增、删、改、查操作
参考答案：
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【简答题】
视图是一个虚表，它是从基表中导出的表。在数据库中，只存放视图的[填空]，不存放视图所对应的数据。
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