Oralce数据恢复

一.FLASHBACK QUERY
--闪回到15分钟前

select * from table_name as of timestamp (systimestamp - interval '15' minute) where ......

 这里可以使用DAY、SECOND、MONTH替换minute，例如：

SELECT * FROM table_name AS OF TIMESTAMP(SYSTIMESTAMP - INTERVAL '2' DAY) where ......

 --闪回到某个时间点

select  *  from table_name as of timestamp to_timestamp ('2013-01-05 16:18:57.845993', 'YYYY-MM-DD HH24:MI:SS.FF') where ......

 --闪回到两天前

select * from table_name as of timestamp (sysdate - 2) where.........

         实例：

insert into table_name
select * from table_name as of timestamp (systimestamp - interval '15' minute) where code = 'XXX'
minus
select * from table_name where code = 'XXX';

二.FLASHBACK DROP
1.如果源表未重建

flashback table orders to before drop; 

 2.如果源表已经重建，可以使用rename to子句

flashback table order to before drop  rename to order_old_version; 

三.FLASHBACK TABLE  
1.首先要启用行迁移：  

alter table order enable row movement;

2.闪回表到15分钟前：  

flashback table order  to timestamp systimestamp - interval '15' minute;

   闪回到某个时间点：   

FLASHBACK TABLE order TO TIMESTAMP TO_TIMESTAMP('2013-01-05 01:15:25','YYYY-MM-DD HH24:MI:SS');