数据库闪回
ALTER TABLE TB_ITEM_INFO ENABLE row movement;


flashback table TB_ITEM_INFO to timestamp to_timestamp('2012-11-19 10:30:00','yyyy-mm-dd hh24:mi:ss');


select * from tableName as of timestamp to_timestamp('2009-01-25 12:00：00', 'yyyy-mm-dd hh24:mi:ss')