You issue the command:
SQL>ALTER DATABASE BACKUP CONTROLFILE TO TRACE;
Which statement is true about the command?
A.It creates a copy of the control file and stores it in the location specified in the diagnostic_dest initialization parameter. B.It creates a file that contains SQL statement to re-create the control file. C.It updates the alert log file with the location and contents of the control file. D.It creates a binary backup of the control file.正确答案B
