What is true about updates through a v

What is true about updates through a view? （）

A You cannot update a view with group functions.
B When you update a view group functions are automatically computed.
C When you update a view only the constraints on the underlying table will be in effect.
D When you update a view the constraints on the views always override the constraints on the underlying tables.

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参考解析：

分类：1Z0-007题库

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