客服电话
APP下载
迪恩网络APP
随时随地掌握行业动态
官方微信
扫描二维码
关注迪恩网络微信公众号
|
当我们不小心误操作致使数据库数据丢失、改变时， 需要对数据库对象做基于时间点的恢复，找到我们需要的数据，这个时间点不能认为精确确定，我们可以通过对oracle日志进行分析，而获得无操作的精确时间点。 SQL> select name from v$archived_log; NAME -------------------------------------------------- /oracle/arch1/1_2_883536782.dbf SQL> SQL> SQL> delete from scott.t1; 576 rows deleted. SQL> alter system archive log current; System altered. SQL> create table scott.t6 as select * from scott.emp; Table created. SQL> alter system archive log current; System altered. SQL> select name from v$archived_log; NAME -------------------------------------------------- /oracle/arch1/1_2_883536782.dbf /oracle/arch1/1_3_883536782.dbf /oracle/arch1/1_4_883536782.dbf --启动log miner添加要分析的日志 SQL> execute dbms_logmnr.add_logfile(logfilename=>'/oracle/arch1/1_2_883536782.dbf',options=>dbms_logmnr.new); PL/SQL procedure successfully completed. --添加需要分析的日志 SQL> execute dbms_logmnr.add_logfile(logfilename=>'/oracle/arch1/1_3_883536782.dbf',options=>dbms_logmnr.addfile); PL/SQL procedure successfully completed. SQL> execute dbms_logmnr.add_logfile(logfilename=>'/oracle/arch1/1_4_883536782.dbf',options=>dbms_logmnr.addfile) PL/SQL procedure successfully completed. --执行log miner SQL> execute dbms_logmnr.start_logmnr(options=>dbms_logmnr.dict_from_online_catalog); PL/SQL procedure successfully completed. --查询分析结果
SQL> alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';
Session altered.
SQL> select username,scn,timestamp,sql_redo from v$logmnr_contents where seg_name='T1';
USERNAME SCN TIMESTAMP
------------------------------ ---------- -------------------
SQL_REDO
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
delete from "SCOTT"."T1" where "EMPNO" = '7782' and "ENAME" = 'CLARK' and "JOB" = 'MANAGER' and "MGR" = '7839' and "HIREDATE" = TO_DATE('1981-06-09 00:00:00', 'yyyy-mm-dd hh24:mi:ss') and "SAL" = '245
0' and "COMM" IS NULL and "DEPTNO" = '10' and ROWID = 'AAAVbSAAFAAAACXABi';
SYS 1494545 2015-06-28 04:24:44
delete from "SCOTT"."T1" where "EMPNO" = '7839' and "ENAME" = 'KING' and "JOB" = 'PRESIDENT' and "MGR" IS NULL and "HIREDATE" = TO_DATE('1981-11-17 00:00:00', 'yyyy-mm-dd hh24:mi:ss') and "SAL" = '500
0' and "COMM" IS NULL and "DEPTNO" = '10' and ROWID = 'AAAVbSAAFAAAACXABj';
SYS 1494545 2015-06-28 04:24:44
delete from "SCOTT"."T1" where "EMPNO" = '7844' and "ENAME" = 'TURNER' and "JOB" = 'SALESMAN' and "MGR" = '7698' and "HIREDATE" = TO_DATE('1981-09-08 00:00:00', 'yyyy-mm-dd hh24:mi:ss') and "SAL" = '1
。。。。。
--结束log miner 分析 SQL> execute dbms_logmnr.end_logmnr; PL/SQL procedure successfully completed. 以上就是本文的全部内容，希望大家可以喜欢。 |
请发表评论