1.首先查找表操作的歷史記錄
select * from v$sqlarea a where a.SQL_TEXT like '%表名%';
2.從上面的記錄中找到update語句對應(yīng)的sql_id
select * from v$sqltext a,v$sqlarea b where a.SQL_ID=b.SQL_ID and b.SQL_ID in('cq53826tk4u3c','afftnrfhu5utk') order by b.LAST_ACTIVE_TIME desc;
3.從上面的記錄中找到最新的sql操作記錄，然后找到用戶名和主機(jī)
select * from sys.v_$session l,sys.v_$sql s where s.SQL_ID='cq53826tk4u3c' and l.USERNAME is not null;

//1.根據(jù)時(shí)間恢復(fù)
//示例：
select * from t_noentryquery;
delete from t_noentryquery where fid=7369;
//查詢當(dāng)前電腦時(shí)間：
select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss')from dual;
//查詢刪除之前數(shù)據(jù)：
select * from t_noentryquery as of timestamp to_timestamp('2018-04-12 09:12:11','yyyy-mm-dd hh24:mi:ss');
//恢復(fù)數(shù)據(jù)：
flashback table t_noentryquery to timestamp to_timestamp('2018-04-12 09:12:11','yyyy-mm-dd hh24:mi:ss');
//注意：若出現(xiàn)報(bào)錯(cuò)：ORA-08189：未啟用行移動(dòng)功能，不能閃回表；
//則：
alter table t_noentryquery enable row movement;  //開啟行移動(dòng)功能
alter table t_noentryquery disable row movement; //關(guān)閉行移動(dòng)功能

   create table test(id number,name varchar2(10),gender varchar2(5));
   insert into test values(1,'宋春風(fēng)','男');
   insert into test values(2,'葉民','男');
   insert into test values(3,'白冰','男');
   insert into test values(4,'方巍森','男');
   insert into test values(5,'孫書禎','男');
   insert into test values(6,'史波','男');
   commit;

   SELECT *
   FROM TEST VERSIONS BETWEEN TIMESTAMP MINVALUE AND MAXVALUE WHERE 
   VERSIONS_STARTTIME IS NOT NULL ORDER BY VERSIONS_STARTTIME DESC;

   UPDATE TEST SET GENDER='女' WHERE NAME='孫書禎';
   UPDATE TEST SET GENDER='女' WHERE NAME='史波';
   commit;