What is the difference between call transaction and session method?

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What is the difference between call transaction and session method?

Session method: The records are not added to the database until the session is processed. sy-subrc is not returned. Error logs are created for error records. Updation in database table is always Synchronous.

Call Transaction method: The records are immediately added to the database table. sy-subrc is returned to 0 if succesful. Error logs are not created and hence the errors need to be handled explicitly. Updation in database table is either Synchronous or Asynchronous.

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