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Your multitenant container database has three pluggable databases (PDBs): PDB1, PDB2, and PDB3.Which two RMAN commands may be; used to back up only the PDB1 pluggable database?（）
A:BACKUP PLUGGABLE DATABASE PDB1 while connected to the root container
B:BACKUP PLUGGABLE DATABASE PDB1 while connected to the PDB1 container
C:BACKUP DATABASE while connected to the PDB1 container
D:BACKUP DATABASE while connected to the boot container
E:BACKUP PLUGGABLE database PDB1 while connected to PDB2

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出自：Oracle认证

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