Which two statements are true regarding views? (Choose two.)
A. A sub query that defines a view cannot include the GROUP BY clause
B. A view is created with the sub query having the DISTINCT keyword can be updated
C. A Data Manipulation Language (DML) operation can be performed on a view that is created with the sub query having all the NOT NULL columns of a table
D. A view that is created with the sub query having the pseudo column ROWNUM keyword cannot be updated
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