Answer / theabapconsultant

batch input method or batch data comunication both are the same. it worls on the principle of simulating user input to the transaction screen via abap program. it can handle errors explicitly . features also include logging and synchronous processing.generally data is given in a flat file in which i undergoes through a screen and screen validation finally inserts in a database. eg: session method and bdc call transaction method
but direct input is asynchrounous.data is directly uploaded in a database by doing some field validations. errors cant be handled. it inserts data using some inbuilt function modules.
eg: LSMW

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