Is it possible to include two transactions with one group name in one program in session method ?

Suppose we are transfer data through BDC from legacy to SAP and their is some duplicate data in legacy system but we don’t want this in SAP system .So how can we check that this data is already exist ?

Can we use Session method & Call transaction both in one BDC if yes please give me example and scenario where we use this ?

How to read files and process BDC's automatically ?

After running a BDC program in background, next day morning when you see the results, few records are not updated(error records). What will you do then ?

Can you call a bdc from a report program ?

What is direct input method ?

Can i have some Realtime Scenarios on Reports.

Some Realtime Objects on Bdc.

Can i Have Some Realtime Examples On Modulepool programming.

Some Realtime Examples on Exits .

Can i Have Some Examples on Enhancements.

Can i Have Some Realtime Examples on Bapi ?

Can i Have Some Realtime Examples on Badi ?

Reliance,

Can i Have Some Realtime Examples on Idocs ?