Choose the best answer. Examine this configuration:
1 CDB1 is a container database.
2There are several pluggable databases (PDBs) in CDB1.
5Each PDB has several tables with referential integrity constraints.
6FLASHBACK DATABASE is ON.
7 UNDO RETENTION GUARANTEE is enabled.
Multiple undesired multitable changes were made in all the PDBs.
Which method can be used to undo the changes using a single command?
A.正确答案Crestore and recover database
B.flashback transaction
C.flashback database
D.flashback table and transaction
E.flashback table
