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多項(xiàng)選擇題

Identify three situations in which you would NOT be able to drop a tablespace. ()

A.when the tablespace is online
B.when the tablespace has segments with data in it
C.when the tablespace is a default permanent tablespace for the database
D.when the tablespace contains a table that is currently being used by transactions
E.when the tablespace contains undo data that is needed to rollback an uncommitted transaction

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