53Examine the details of the uncompr

单选题 53
Examine the details of the uncompressed, non-partitioned heap table CITIES.

Examine the command:
SQL>ALTER TABLE cities SHRINK SPACE COMPACT;
What must you do before executing it?

A、 Disable all indexes on the table

B、 Enable row movement is enabled

C、 ensure there are no pending transactions on the table

D、 Ensure free space that is approximately equal to the space used by the table should be available

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