Here's the steps for backup a db schema, which just applies to oracle database.
Suppose the osl schema is osl/welcome1, and the ORACLE_SID=orcl, then:
- Export Schema (backup)
- First, create directory expdir
SQL> CONNECT system/welcome1
SQL> CREATE OR REPLACE DIRECTORY expdir AS '/home/oracle/exp_data';
SQL> GRANT READ,WRITE ON DIRECTORY expdir TO PUBLIC; - Then use expdp
$ORACLE_HOME/bin/expdp osl/welcome1@orcl DUMPFILE=osl_bak.dmp DIRECTORY=expdir SCHEMAS=osl - Then you can copy the /home/oracle/exp_data/osl_bak.dmp to some other directory or some other machine to backup it.
- First, create directory expdir
- Import Schema (restore)
- First, create directory expdir (if you already created it, plz ignore this step)
- Then delete the osl schema (beware of this step !!!)
SQL> CONNECT system/welcome1
SQL> DROP USER osl CASCADE;
- Then use impdp
$ORACLE_HOME/bin/impdp osl/welcome1 DIRECTORY=expdir DUMPFILE=osl_bak.dmp