多选题Which operation requires that you create an auxiliary instance manually before executing the operation？（）ABackup-based database duplication.BActive database duplication.CTablespace point-in-time recovery.DNo operation requires the creation of an auxiliary instance.
多选题
Which operation requires that you create an auxiliary instance manually before executing the operation？（）
A
Backup-based database duplication.
B
Active database duplication.
C
Tablespace point-in-time recovery.
D
No operation requires the creation of an auxiliary instance.
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