oracle中还原已经删除的记录

 

闪存序列：

Method 1：
1-select dbms_flashback.get_system_change_number from dual;
2-select * from emp as of scn xxxx;

Method 2：
1-select timestamp_to_scn(to_timestamp('2011-07-05 09:00:00','yyyy-MM-dd HH:MI:SS')) from dual;
2-select * from emp as of scn 11397958;