Hi Sachin,
I hope your problem was solved meanwhile.
Anyway if you are still looking for a simple method to extract data from SAP tables or queries/quickviews in BACKGROUND without any coding and customization you may consider T3CP.
This tool reads data from your SAP system by RFC into almost any database automatically. T3CP is executed on any MS Windows system and feeds the data for example into a MDB database. The data extraction routine(s) can be scheduled as background jobs on your Windows machine. No human action is required.
You can find T3CP under http://www.csbg.de/en/t3cp
If you like to do build this yourself you find good hints under http://scn.sap.com/docs/DOC-45293 "Read data from SAP tables into MS Access...".
hth
Christian