The output table will contain two fields: IN_FID and FEAT_SEQ.
The IN_FID field can be used to join the records of the output table back to the input dataset.
Identical records have the same FEAT_SEQ value while nonidentical records will have sequential value. FEAT_SEQ values have no relationship to IDs of input records.
IN_FID and FEAT_SEQ???
I just don't know what to do.