Which command will result in a trace file being created with the create controlfile command contained in it？（）
- A、 alter database backup controlfile
- B、 alter database backup controlfile to trace
- C、 alter database controlfile backup
- D、 alter database controlfile backup to ’/ora01/oracle/ctrl_backup.ctl’
- E、 alter database begin controlfile backup
正确答案:B
答案解析:有
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