ALTER TABLE TABLE_NAME ENABLE ROW MOVEMENT;
--TO TIMESTAMP是指定需要回滚到的时间点
FLASHBACK TABLE TABLE_NAME TO TIMESTAMP TO_TIMESTAMP('2017-08-18 00:00:00','YYYY-MM-DD HH24:MI:SS');
ALTER TABLE TABLE_NAME ENABLE ROW MOVEMENT;
FLASHBACK TABLE TABLE_NAME TO TIMESTAMP TO_TIMESTAMP('2017-08-18 00:00:00','YYYY-MM-DD HH24:MI:SS');