下列（）命令可以回收用户权限。A、roll backB、getC、backD、revoke
下列（）命令可以回收用户权限。
- A、roll back
- B、get
- C、back
- D、revoke
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单选题在SQL中，回收用户操作权限的命令是（）AGRANTBFROMCSETDREVOKE