oracle delete 数据恢复

/*1.FLASHBACK QUERY*/

--闪回到15分钟前
select *  from orders  as of timestamp (systimestamp - interval ''15'' minute)  where ......
这里可以使用DAY、SECOND、MONTH替换minute,例如:
SELECT * FROM orders AS OF TIMESTAMP(SYSTIMESTAMP - INTERVAL ''2'' DAY)

--闪回到某个时间点
select  *  from orders  as of timestamp  to_timestamp (''01-Sep-04 16:18:57.845993'', ''DD-Mon-RR HH24:MI:SS.FF'') where ...

--闪回到两天前
select * from orders  as of timestamp (sysdate - 2) where.........

/*2.FLASHBACK DROP*/

  1.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;
 
/*3.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('2007-09-12 01:15:25 PM','YYYY-MM-DD HH:MI:SS AM')

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