学步园

赋权并创建dblink

[oracle@zhongwc1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Mon Feb 4 10:26:45 2013

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

SQL> grant create database link to zwc;

Grant succeeded.

SQL> conn zwc/
Enter password: 
Connected.
SQL> show user
USER is "ZWC"
SQL> select tname from tab;

no rows selected

create public database link ZWC
  connect to zhongwc identified by zhongwc
  using '(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.201)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = ZWC)
    )
  9    )';

Database link created.

SQL> select * from dual@zwc;

D
-
X

SQL> show user
USER is "ZWC"
SQL> select tname from tab;

no rows selected

SQL> select tname from tab@zwc;

TNAME
------------------------------
T_ZHONGWC

SQL> select count(*) from t_zhongwc;
select count(*) from t_zhongwc
                     *
ERROR at line 1:
ORA-00942: table or view does not exist


SQL> select count(*) from t_zhongwc@zwc;

  COUNT(*)
----------
     75453

SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
[oracle@zhongwc1 ~]$ impdp system/oracle network_link=zwc schemas=zhongwc remap_schema=zhongwc:zwc

Import: Release 11.2.0.3.0 - Production on Mon Feb 4 10:47:45 2013

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
Starting "SYSTEM"."SYS_IMPORT_SCHEMA_01":  system/******** network_link=zwc schemas=zhongwc remap_schema=zhongwc:zwc 
Estimate in progress using BLOCKS method...
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 9 MB
Processing object type SCHEMA_EXPORT/USER
ORA-31684: Object type USER:"ZWC" already exists
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/TABLE/TABLE
. . imported "ZWC"."T_ZHONGWC"                            75453 rows
Job "SYSTEM"."SYS_IMPORT_SCHEMA_01" completed with 1 error(s) at 10:48:32

验证

[oracle@zhongwc1 ~]$ sqlplus zwc

SQL*Plus: Release 11.2.0.3.0 Production on Mon Feb 4 10:50:09 2013

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

Enter password: 

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

SQL> select count(*) from t_zhongwc@zwc;

  COUNT(*)
----------
     75453

SQL> select count(*) from t_zhongwc;

  COUNT(*)
----------
     75453

SQL> drop public database link zwc;

Database link dropped.

SQL> select count(*) from t_zhongwc@zwc;
select count(*) from t_zhongwc@zwc
                               *
ERROR at line 1:
ORA-02019: connection description for remote database not found


SQL> select count(*) from t_zhongwc;

  COUNT(*)
----------
     75453