expdp&impdp

1 创建逻辑文件夹，该命令不会在操作系统创建真正的文件夹，最好以system等管理员创建。

 create directory dpdata1 as '/opt/oracle/dpdata1';

 create directory expdata as '/ora_arch/expdata';

2 查看管理理员文件夹（同一时候查看操作系统是否存在，由于Oracle并不关心该文件夹是否存在，假设不存在，则出错）

 select * from dba_directories;

3 给scott用户赋予在指定文件夹的操作权限，最好以system等管理员赋予。

 grant read,write on directory expdata to ardb;

4 导出数据

 1)按用户导

 expdp billingcdrdb/billingcdrdb@prodbillingcdrdb schemas=billingcdrdb dumpfile=prodbillingcdrdb.dmp directory=dpdata1 logfile=prodbillingcdrdb.log;

 expdp billingcdrdb/billingcdrdb@prodbillingcdrdb schemas=billingcdrdb dumpfile=prodbillingcdrdb.dmp directory=dumpdir CONTENT=METADATA_ONLY logfile=prodbillingcdrdb.log;

 2)并行进程parallel

 expdp scott/tiger@orcl directory=dpdata1 dumpfile=scott3.dmp parallel=40 job_name=scott3

 3)按表名导

 expdp ardb/ardb TABLES=log_trx_detail dumpfile=log_trx_detail.dmp DIRECTORY=expdata;

 4)按查询条件导

 expdp scott/tiger@orcl directory=dpdata1 dumpfile=expdp.dmp Tables=emp query='WHERE deptno=20';

 5)按表空间导

 expdp system/manager DIRECTORY=dpdata1 DUMPFILE=tablespace.dmp TABLESPACES=temp,example;

 6)导整个数据库

 expdp system/manager DIRECTORY=dpdata1 DUMPFILE=full.dmp FULL=y;

5 还原数据

 1)导到指定用户下

 impdp scott/tiger DIRECTORY=dpdata1 DUMPFILE=expdp.dmp SCHEMAS=scott;

 2)改变表的owner

 impdp system/manager DIRECTORY=dpdata1 DUMPFILE=expdp.dmp TABLES=scott.dept REMAP_SCHEMA=scott:system;

 3)导入表空间

 impdp system/manager DIRECTORY=dpdata1 DUMPFILE=tablespace.dmp TABLESPACES=example;

 4)导入数据库

 impdb system/manager DIRECTORY=dump_dir DUMPFILE=full.dmp FULL=y;

 5)追加数据

 impdp system/manager DIRECTORY=dpdata1 DUMPFILE=expdp.dmp SCHEMAS=system TABLE_EXISTS_ACTION

drop user algeria cascade ;

 create user algeria identified by algeria default tablespace algeria ;

 grant connect , resource to algeria ;

 grant create synonym , create view to algeria ;

 create directory algeria as 'd:\algeria';

 impdp billingcdrdb1/billingcdrdb1 directory=dpdata1 dumpfile=prodbillingcdrdb.dmp remap_schema=billingcdrdb:billingcdrdb1 logfile=impdp.log