Copy Database from One Schema to Another.

Hi,
I have two schema's in my database named as DEV AND PROD, I need to copy PROD schema to DEV schema, Please suggest me some best method to do this i will be frequently cleaning the DEV and copying PROD schema to DEV Schema.
Please suggest me how to clean and copy also is there any option to overwrite Please let me know this option as well.
Thanks
Sudhir

Hi,
I created database link and executed the command as you suggested, But I am getting a error can you tell me what is the issue. I am using Oracle 10g XE version database.
/* Creating Database link between PRODUCTION AND DEVELOPMENT schemas */
SQL> CREATE DATABASE LINK PROD_TO_DEV CONNECT TO PRODUCTION IDENTIFIED BY PRODUCTION USING 'XE';
/* Executed this command in command line */
c:\ impdp SYSTEM/sudhir123 network_link=PROD_TO_DEV schemas=PRODUCTION remap_schema=PRODUCTION:DEVELOPMENT TABLE_EXISTS_ACTION=REPLACE
When I execute the above command in the command link it is giving me following error as mentioned below.
UDI - 00008: Operation generated ORACLE error 12560
ORA - 12560: TNS : protocol adapter error
Please suggest me what might be the error, But i am able to connect to database.
I also have another database with Oracle 10g Enterprise edition in another system will it be same process for both the database versions
Thanks
Sudhir

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