What is true about updates through a view?
A.
When you update a view only the constraints on the underlying table will be in effect.
B.
When you update a view the constraints on the views always override the constraints on
theunderlying tables.
C.
When you update a view group functions are automatically computed.
D.
You cannot update a view with group functions.
Explanation:
If a view is defined by a query that contains SET or DISTINCT operators, a GROUP BY clause, or a group function, then rows cannot be inserted into, updated in, or deleted from the base tables using the view.
https://docs.oracle.com/cd/B28359_01/server.111/b28310/views001.htm