標籤:io 使用 for on 資料 ef amp as 時間
/*1.FLASHBACK QUERY*/ --閃回到15分鐘前 select * from orders as of timestamp (systimestamp - interval ‘‘15‘‘ minute) where ...... 這裡可以使用DAY、SECOND、MONTH替換minute,例如: SELECT * FROM orders AS OF TIMESTAMP(SYSTIMESTAMP - INTERVAL ‘‘2‘‘ DAY) --閃回到某個時間點 select * from orders as of timestamp to_timestamp (‘‘01-Sep-04 16:18:57.845993‘‘, ‘‘DD-Mon-RR HH24:MI:SS.FF‘‘) where ... --閃回到兩天前 select * from orders as of timestamp (sysdate - 2) where......... /*2.FLASHBACK DROP*/ 1.flashback table orders to before drop; 2.如果源表已經重建,可以使用rename to子句: flashback table order to before drop rename to order_old_version; /*3.FLASHBACK TABLE*/ 1.首先要啟用行遷移: alter table order enable row movement; 2.閃回表到15分鐘前: flashback table order to timestamp systimestamp - interval ‘‘15‘‘ minute; 閃回到某個時間點: FLASHBACK TABLE order TO TIMESTAMP TO_TIMESTAMP(‘2007-09-12 01:15:25 PM‘,‘YYYY-MM-DD HH:MI:SS AM‘)
ORACLE 恢複刪除的資料