oracle imp exp 导入导出

 

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CREATE TABLE xue_sheng( id integer, xing_ming varchar(25));

INSERT INTO xue_sheng VALUES(1,'ZhanSan');

INSERT INTO xue_sheng VALUES(2,'LiSi');

COMMIT;

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下面开始进行备份： (备份学生表里的全部数据)

[oracle@localhost ~]$ exp scott/tiger    <- 这里输入账号

Export: Release 11.2.0.1.0 - Production on Thu Jul 15 05:30:10 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Enter array fetch buffer size: 4096 > 4096 <-这里是缓冲区大小， 默认4096

Export file: expdat.dmp > mydata.dmp    <-输入备份文件名字，默认名字expdat.dmp

(2)U(sers), or (3)T(ables): (2)U > T    <- 因为我要备份表，所以选择T

Export table data (yes/no): yes > yes    <- 是否导出表中的数据

Compress extents (yes/no): yes > yes    <- 是否对数据进行压缩

Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses AL32UTF8 character set (possible charset conversion)

About to export specified tables via Conventional Path ...
Table(T) or Partition(T:P) to be exported: (RETURN to quit) > xue_sheng <-输入备份的表名字

. . exporting table                      XUE_SHENG          2 rows exported <-导出提示信息
Table(T) or Partition(T:P) to be exported: (RETURN to quit) >        <- 退出就直接回车

Export terminated successfully without warnings.
[oracle@localhost ~]$


如果刚才没有指定备份文件的具体路径，备份文件mydata.dmp就会在当前目录下
[oracle@localhost ~]$ ls my*
mydata.dmp

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先把xue_sheng 表的数据全部删除

[oracle@localhost ~]$ sqlplus scott/tiger

SQL> select * from xue_sheng;

SQL> delete from xue_sheng;

SQL> commit;

SQL> select * from xue_sheng;

SQL> exit;

下面使用 IMP 进行数据恢复

[oracle@localhost ~]$ imp scott/tiger

Import: Release 11.2.0.1.0 - Production on Thu Jul 15 05:54:32 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

Import data only (yes/no): no > yes

Import file: expdat.dmp > mydata.dmp

Enter insert buffer size (minimum is 8192) 30720>

Export file created by EXPORT:V11.02.00 via conventional path
import done in US7ASCII character set and AL16UTF16 NCHAR character set
import server uses AL32UTF8 character set (possible charset conversion)
List contents of import file only (yes/no): no >

Ignore create error due to object existence (yes/no): no >

Import grants (yes/no): yes >

Import table data (yes/no): yes >

Import entire export file (yes/no): no > yes

. importing SCOTT's objects into SCOTT
. . importing table                    "XUE_SHENG"          2 rows imported
Import terminated successfully with warnings.
[oracle@localhost ~]$

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验证一下数据是否被恢复

[oracle@localhost ~]$ sqlplus scott/tiger

SQL> select * from xue_sheng;

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还有拷贝文件的备份方式

例如将 /u01/oradata/wilson 目录下的所有文件拷贝到其他地方

control01.ctl  redo01.log  redo03.log    system01.dbf  undotbs01.dbf
example01.dbf  redo02.log  sysaux01.dbf  temp01.dbf    users01.dbf


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