--查看当前SCN数值

SELECT dbms_flashback.get_system_change_number from dual;

--Scn与时间的对应关系

SELECT to_char(sysdate,’yyyy-mm-dd hh24:mi:ss’, to_char(DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER) AS ?SCN ? from dual;

--通过时间flashback query数据

SELECT * FROM scott.test AS OF TIMESTAMP TO_TIMESTAMP('2013-11-17 10:25:17', 'YYYY-MM-DD HH:MI:SS');?

--通过SCN 闪回数据

SELECT * FROM scott.test AS OF SCN 23565583;

--闪回表中误删除的数据

flashback table tablename to timestamp xxx?

flashback table tablename to scn xxx

--闪回表前提条件

--该表需开启行移动功能，可在恢复之前打开再执行恢复

alter table test enable row movement;

?