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You conned using SQL Plus to the root container of a multitenant container database (CDB) with SYSDBA privilege. The CDB has several pluggable databases (PDBs) open in the read/write mode. There are ongoing transactions in both the CDB and PDBs. What happens alter issuing the SHUTDOWN TRANSACTIONAL statement?（）
A:The shutdown proceeds immediately. The shutdown proceeds as soon as all transactions in the PDBs are either committed or rolledhack.
B:The shutdown proceeds as soon as all transactions in the CDB are either committed or rolled back.
C:The shutdown proceeds as soon as all transactions in both the CDB and PDBs are either committed or rolled back.
D:The statement results in an error because there are open PDBs.

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出自：Oracle认证

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