Compare Material Master classification data with ECC

Hi Folks,

I have a critical requirement where i have to compare the input file that contains material master and classification data (around 300 columns) with material master and classification data in ECC and identify the discrepancies for each field. You heard it right. I have to compare all the 300 fields and identify if there is any discrepancy. I know this is a big task. Any suggestion on extracting the classification data from ECC and there by comparing it with input file. Appreciate your help.

Thanks in Advance,