A、The corresponding indexes for the table are also truncated.

B、Delete triggers on the table are fired during the execution of the TRUNCATE command.

C、The child table is truncated when the TRUNCATE command is applied on the parent table.

D、The high-water mark （HWM） is set to point to the first usable data block in the table segment.

E、No undo or very little undo data is generated during the execution of the TRUNCATE command