数据泵（expdp和impdp）备份恢复数据库

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一、数据泵（expdp和impdp）

1、expdp

①在数据库中创建导出数据的目录

create or replace directory exp_dir as 'd:\or_exp_dir';

②把目录授权给bankuser

grant read,write on directory exp_dir to scott;

③用expdp导出数据

expdp scott/tiger@orcl directory=exp_dir dumpfile=test.dmp logfile=testExp.log

1)按用户导

expdp scott/tiger@orcl schemas=scott dumpfile=expdp.dmp DIRECTORY=dpdata1;

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 scott/tiger@orcl TABLES=emp,dept dumpfile=expdp.dmp DIRECTORY=dpdata1;

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;

2、impdp

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=append；

3 、例

impdp 'sys/oracle@PLUS as sysdba' DIRECTORY=dumpdir dumpfile=FMIS9999.dmp logfile=FMIS9999 schemas=FMIS9999 exclude=statistics parallel=2

 

(导出)expdp FMIS9999/1234.abcd@eleinvoice DIRECTORY=dumpdir dumpfile=FMIS9999.dmp logfile=FMIS9999.log schemas=FMIS9999 parallel=2

expdp \"/ as sysdba\" directory=EXPDIR

dumpfile=FMIS9999.dmp logfile=fmis9999_expdp.Log

SCHEMAS=FMIS9999,ODS,FMISTMP COMPRESSION=All  exclude=statistics job_name=zgq