Oracle 10G 数据泵学习纪要(expdp/impdp)
欢迎进入Oracle社区论坛,与200万技术人员互动交流 >>进入 实例: 1、通过DBLINK的方式:表空间不一样 impdp logfile=DUP_MCMDB.LOG network_link=to_crm_7 schemas=MCMDB REMAP_TABLESPACE=table_space11:table_space12,table_space21:table_space22 2、通
欢迎进入Oracle社区论坛,与200万技术人员互动交流 >>进入
实例:
1、通过DBLINK的方式:表空间不一样
impdp logfile=DUP_MCMDB.LOG network_link=to_crm_7 schemas=MCMDB REMAP_TABLESPACE=table_space11:table_space12,table_space21:table_space22 |
2、通过DBLINK的方式:方案(schemas)不一样
impdp logfile=DUP_MCMDB.LOG network_link=to_crm_7 schemas=MCMDB remap_schema=MCMDB:MCMDB1 |
前言:
Oracle Database 10g引入了最新的数据泵(Data Dump)技术,使DBA或开发人员可以将数据库元数据(对象定义)和数据快速移动到另一个oracle数据库中。
数据泵导出导入(EXPDP和IMPDP)的作用
1,实现逻辑备份和逻辑恢复。
2,在数据库用户之间移动对象。
3,在数据库之间移动对象
4,实现表空间搬移。
数据泵导出导入与传统导出导入的区别:在10g之前,传统的导出和导入分别使用EXP工具和IMP工具,从10g开始,不仅保留了原有的EXP和IMP工具,还提供了数据泵导出导入工具EXPDP和IMPDP.使用EXPDP和IMPDP时应该注意的事项;EXP和IMP是客户段工具程序,它们既可以在可以客户端使用,也可以在服务端使用。
EXPDP和IMPDP是服务端的工具程序,他们只能在ORACLE服务端使用,不能在客户端使用IMP只适用于EXP导出文件,不适用于EXPDP导出文件;IMPDP只适用于EXPDP导出文件,而不适用于EXP导出文件。
数据泵导出包括导出表,导出方案,导出表空间,导出数据库4种方式。
建目录与赋权:
SQL>create directory dump_dir as '/u01/dmdir';
SQL>grant read,write on directory to test;
SQL>select * from dba_directories; ――查看目录
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