单选题The DBA is defining role for users. Which of the following is not an acceptable method for defining a default role?（）A ALTER USER DEFAULT ROLE ALLB ALTER USER DEFAULT ROLE ALL EXCEPT ROLE_1C ALTER USER DEFAULT ROLE NONED ALTER USER DEFAULT ROLE NONE EX
题目
单选题
The DBA is defining role for users. Which of the following is not an acceptable method for defining a default role?（）
A
ALTER USER DEFAULT ROLE ALL
B
ALTER USER DEFAULT ROLE ALL EXCEPT ROLE_1
C
ALTER USER DEFAULT ROLE NONE
D
ALTER USER DEFAULT ROLE NONE EXCEPT ROLE_1