oracle数据库数据恢复：表数据恢复
2015-1-20 11:34:33 点击：
郑州泰源数据恢复，内存卡数据恢复，三星手机卡数据恢复。
oracle数据库操作不小心把数据表内的数据删除了，这可是一件非常不幸的消息，于是杯具了，残酷的事实摆在面前，如何恢复数据变得十分严峻，下面是模拟oracle数据库删除表内数据进行恢复。
1、建表-
-- Create table
-
create table DARCY
-
(
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ID NUMBER,
-
INFO NVARCHAR2(32)
-
)
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tablespace DATA_SGPM
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pctfree 10
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initrans 1
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maxtrans 255
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storage
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(
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initial 64K
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minextents 1
- maxextents unlimited
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insert into "SGPM"."DARCY"("ID","INFO") values ('1','aaa');
-
-
insert into "SGPM"."DARCY"("ID","INFO") values ('2','bbb');
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- insert into "SGPM"."DARCY"("ID","INFO") values ('3','ccc');
3、删除数据
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SQL> select * from darcy;
-
-
ID INFO
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----------
--------------------------------------------------------------------------------
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1 aaa
-
2 bbb
-
3 ccc
-
-
SQL> delete from darcy where id = 1;
-
-
1 row deleted
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-
SQL> commit;
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-
Commit complete
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-
SQL> select * from darcy;
-
-
ID INFO
-
----------
--------------------------------------------------------------------------------
-
2 bbb
- 3 ccc
4、恢复数据
方法1：
查询最新的系统变更number
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SQL> select dbms_flashback.get_system_change_number from dual;
-
-
GET_SYSTEM_CHANGE_NUMBER
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------------------------
- 18144344
查看此次变更后的表记录
- SQL> select * from darcy as of scn 18144344;
ID INFO
---------- --------------------------------------------------------------------------------
2 bbb
3 ccc
说明这是删除数据后的表记录，我们只要找到某个scn，即删除表记录前的scn，
恢复到这个scn时的记录。
- SQL> SELECT * FROM DARCY as of scn 18144252;
ID INFO
---------- --------------------------------------------------------------------------------
1 aaa
2 bbb
3 ccc
然后直接执行insert语句
方法2：
- SQL> select * from flashback_transaction_query where table_name='DARCY';
XID START_SCN START_TIMESTAMP COMMIT_SCN COMMIT_TIMESTAMP LOGON_USER UNDO_CHANGE# OPERATION TABLE_NAME TABLE_OWNER ROW_ID UNDO_SQL
---------------- ---------- --------------- ---------- ---------------- ------------------------------ ------------ -------------------------------- -------------------------------------------------------------------------------- -------------------------------- ------------------- --------------------------------------------------------------------------------
07001500AB280000 18144149 2010-9-9 10:14: 18144281 2010-9-9 10:17:1 SGPM 1 DELETE DARCY SGPM AAAYQwAAcAAAKk2AAA insert into "SGPM"."DARCY"("ID","INFO") values ('1','aaa');
080018005F370000 18144244 2010-9-9 10:16: 18144252 2010-9-9 10:16:3 SGPM 1 INSERT DARCY SGPM AAAYQwAAcAAAKk2AAC delete from "SGPM"."DARCY" where ROWID = 'AAAYQwAAcAAAKk2AAC';
080018005F370000 18144244 2010-9-9 10:16: 18144252 2010-9-9 10:16:3 SGPM 2 INSERT DARCY SGPM AAAYQwAAcAAAKk2AAB delete from "SGPM"."DARCY" where ROWID = 'AAAYQwAAcAAAKk2AAB';
080018005F370000 18144244 2010-9-9 10:16: 18144252 2010-9-9 10:16:3 SGPM 3 INSERT DARCY SGPM AAAYQwAAcAAAKk2AAA delete from "SGPM"."DARCY" where ROWID = 'AAAYQwAAcAAAKk2AAA';
执行UNDO_SQL，即：insert into "SGPM"."DARCY"("ID","INFO") values ('1','aaa');即可恢复数据。
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