How to copy data from one database/table to another database/table

In a typical Oracle environment, you have TNS names set up. That's a service to lookup the connection parameters for Oracle instances given an SID or service name. In it's simplest form, TNS names is a file called tnsnames.ora located by the environment variable TNS_ADMIN (which points to the directory where the file is).

Given the SIDs PROD and SANDBOX, you can then copy the tables from the SQLPLUS command line utility:

COPY FROM username1/passwd1@PROD to username2/passwd2@SANDBOX
    INSERT TABLE_C (*) USING (SELECT * FROM TABLE_C WHERE COL_A = 4884);

Please note that this COPY command only supports a limited set of Oracle datatypes: char, date, long, varchar2, number.

If you don't have TNS names set up, you'll need to know the host name or IP address, the port number and the service name. The syntax then becomes:

COPY FROM username1/passwd1@//192.168.3.17:1521/PROD_SERVICE to username2/passwd2@//192.168.4.17:1521/SANDBOX_SERVICE
    INSERT TABLE_C (*) USING (SELECT * FROM TABLE_C WHERE COL_A = 4884);

To determine the SID and/or service name, you best have a look into the TNSNAMES.ORA file on the database server itself. If you are able to login to the database, you can use the following queries to determine the SID and service name (but don't ask me which is which):

select name from v$database;

select * from global_name;

select instance_number, instance_name, host_name from v$instance;

Copy gpl_project/gpl_project@gpldatar to gpl_project/gpl_project@gplrdp. Replace BGROUPMASTER using select * from BGROUPMASTER.

The following is the solution that I used. I created a link the remote database then used an INSERT command to populate the data.

CREATE DATABASE LINK database_link_name 
CONNECT TO my_user_name IDENTIFIED BY my_password
USING 'tns_name';

INSERT INTO my_table SELECT * FROM my_remote_table@database_link_name;

If you want to get rid of the database link after the work. Use the following:

DROP DATABASE LINK database_link_name;

See this link for helpful information: https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:9532217300346683472