Hi Mayuresh,
I just want to add comments from Ganesh.
If you have SSIS installed on your SQL server, you can SSIS to extract or import data from SAP. Please have a look at the following link for detailed information
http://msdn.microsoft.com/en-us/library/dd788623(v=bts.80).aspx
For more information about BAPI, I found the following tutorial useful to get my head around finding correct BAPI and how to use it.