Hi Suraj
You need to deploy a second copy of the SQL QPAC, and point it at a different datasource. The datasource is defined as a deployment parameter (it will prompt you when you deploy the new version of the qpac).
You will also need to define the datasource in your application server. This is done in different ways for different application servers - for details, please see: standards_based_qpacs.pdf (part of the Workflow SDK), page 12, "Creating a JNDI datasource".
Alternately, you can try out our SQLPlus QPAC. This allows you to directly specify connection url, driver, username and password. The SQLPlus QPAC does a lot of other things that the regular SQL QPAC doesn't do, such as handling multiple rows, testing your query, and outputting the data in a variety of ways.
Details at:
http://www.avoka.com/avoka/qpac_library.shtmlHoward