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【多项选择题】

You want to flash back a test database by five hours.You issue this command:SQL > FLASHBACK DATABASE TO TIMESTAMP (SYSDATE - 5/24);Which two statements are true about this flashback scenario?（）

A、A. The database must have multiplexed redo logs for the flashback to succeed.

B、B. The database must be MOUNTED for the flashback to succeed.

C、C. The database must use block change tracking for the flashback to succeed.

D、D. The database must be opened in restricted mode for the flashback to succeed.

E、E. The database must be opened with the RESETLOGS option after the flashback is complete.

F、F. The database must be opened in read-only mode to check if the database has been flashed back to the correct SCN.

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