<{p}>20、Which three are true in Oracle 19c and later releases?<{/p}>

【多选题】
A Simultaneous data pump jobs can be limited at the pluggable database(PDB） level
B An ordinary data pump export of a table with encrypted columns will always encrypt the same columns when imported
C Tablespaces always remain in read/write mode during transportable tablespace operations
D A transportable data pump import can leave a plugged-in tablespace in read/write mode.
E Tablespaces never remain in read/write mode during transportable tablespace operations
F A transportable data pump import can leave a plugged-in tablespace in read-only mode

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