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When a company decides to implement the SAP R/3 to manage business critical data, it usually does not start from a no-data situation. Normally, a SAP R/3 project comes into replace or complement existing application.


In the process of replacing current applications and transferring application data, two situations might occur:

• The first is when application data to be replaced is transferred at once, and only once.
  
• The second situation is to transfer data periodically from external systems to SAP and vice versa.
  
• There is a period of time when information has to be transferred from existing application, to SAP R/3, and often this process will be repetitive.
  

The SAP system offers two primary methods for transferring data into SAP systems. From non-SAP systems or legacy system. These two methods are collectively called “batch input” or “batch data communication”.

1. SESSION METHOD
2. CALL TRANSACTION
3. DIRECT INPUT

Starting with the concept of data transfer, you will find details steps required for getting data into SAP.

Download Batch Data Communication User Guide

Credit: sapdocs.info