Exp/Imp是普遍使用的逻辑备份方式 使用Exp/Imp工具的场景 1、 两个数据库之间传送数据,可以不同数据库版本,不同操作系统 2、
Exp/Imp是普遍使用的逻辑备份方式
使用Exp/Imp工具的场景
1、 两个数据库之间传送数据,可以不同数据库版本,不同操作系统
2、 数据库的备份和恢复
3、 从一个数据库用户传到另一个数据库用户
4、 从一个表空间传到领一个表空间
在sqlplus中设置显示数据的长度大小
查看数据文件名和对应的表空间
创建一个表空间
datafile 'C:\APP\DRAGON\ORADATA\ZLPXB\BANK_DATA02.DBF'
创建用户使用该表空间
使用bankuser登陆数据库并创建表
(
);
commit;
查看用户使用的表空间
测试exp、imp
实际工作中用的最多的导出命令
exp userid=sys/sys@orcl BUFFER=8192 FILE=x:\*.dmp LOG=x:\*.log full=y grants=y
实际工作中用的最多的导入命令
imp userid=sys/sys@orcl BUFFER=81920 FILE=x:\*.dmp LOG=x:\*.log full=y grants=y ignore=y
使用expdp、impdp迁移数据
expdp、impdp可以看做是exp、imp的升级版,两者主要区别如下:
1、 emp和imp是客户端工具程序,但他们可以在客户端和服务端都可以使用。
2、 expdp和impdp是服务端的工具程序,只能在服务端使用,,迁移速度比较快。
测试expdp、impdp
在Linux下使用expdp、impdp
create or replace directory expdp_dir as '/home/oracle/expdp_dir';
mkdir expdp_dir
chmod 777 expdp_dir
数据泵导出的方法有多种,这里我们只介绍两种:
Ø 单个用户方案导出
Expdp [用户名]/[密码]@[主机字符窜] schemas=[用户名] dumpfile=X.dmp logfile=X.log directory=expdp_dir
Ø 数据库全库导出
Expdp [用户名]/[密码]@[主机字符窜] full=y dumpfile=X.dmp logfile=X.log directory=expdp_dir
² 数据泵导入
按以上导出方式:
Ø 单个用户方案导入
impdp [用户名]/[密码]@[主机字符窜] schemas=[用户名] dumpfile=X.dmp logfile=X.log directory=expdp_dir ignore=y
Ø 数据库全库导入
impdp [用户名]/[密码]@[主机字符窜] full=y dumpfile=X.dmp logfile=X.log directory=expdp_dir ignore=y

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