Automatically create sales objects in background
Very very new to the SAP, so this question is very elemental, and hoping for some direction on how to accomplish this!
Scenario: from legacy system output daily sales order, delivery, invoice information. These output will be tab delimited txt file. Need to load them to SAP in a periodic fashion in the background. Sales order, delivery ,invoice may or may not be relate to each other.
Do I use Bapi, BDC, write my own ABAP code, IDoc batch load?
Any help will be greatly appreciated. and any link regarding books or resource on this kind integration are also much appreciated it.!