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多項選擇題

In RMAN, when the RESYNC CATALOG command is issued, in which two situations does the command file actually perform synchronization?()

A.After the COPY command.
B.After adding a data file in the target database.
C.After adding a tablespace in the target database.
D.After adding a tablespace in the catalog database.
E.After dropping a data file in the catalog database.
F.After running SQL Loader to load a large amount of data.

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