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When should you create a role?（）
A:To simplify the process of creating new users using the CREATE USER xxx IDENTIFIED by yyy statement.
B:To grant a group of relate privileges to a user.
C:When the number of people using the database is very high.
D:To simplify the process of granting and revoking privileges.
E:To simplify profile maintenance for a user who is constantly traveling.

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出自：Oracle认证

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