（197）Which of the following commands will fail?

A. report schema;

B. report need backup;

C. report need backup days 3;

D. report user;

E. report obsolete;

答案：（D）

解析：

RMAN>report user;

RMAN-00571:===========================================================

RMAN-00569:===============ERROR MESSAGE STACK FOLLOWS===============

RMAN-00571:===========================================================

RMAN-00558:error encountered while parsing input commands

RMAN-01009:syntax error:found"identifier":expecting one of:"device,need,obsolete,schema,unrecoverable"

RMAN-01008:the bad identifier was:user

RMAN-01007:at line 1 column 8 file:standard input

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Oracle 11G OCP 1Z0-053 197