多选题Which two statements are true regarding views?（）AA subquery that defines a view cannot include the GROUP BY clauseBA view that is created with the subquery having the DISTINCT keyword can be updatedCA view that is created with the subquery having the pseudo column ROWNUM keyword cannot be updatedDA data manipulation language (DML) operation can be performed on a view that is created with the subquery having all the NOT NULL columns of a table
多选题
Which two statements are true regarding views?（）
A
A subquery that defines a view cannot include the GROUP BY clause
B
A view that is created with the subquery having the DISTINCT keyword can be updated
C
A view that is created with the subquery having the pseudo column ROWNUM keyword cannot be updated
D
A data manipulation language (DML) operation can be performed on a view that is created with the subquery having all the NOT NULL columns of a table
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