Hi,
You are getting given output in shown format because row, pernr is key field.
If you want the output in desired format then create 1 more internal table ITBA3 with three field-row, pernr, test_column.
sort it_test_table by pernr.
Loop on it_pernr into wa_pernr.
wa_itab3-row = wa_pernr-row.
wa_itab3-pernr = wa_pernr-pernr.
read table it_test_table into wa_test with key pernr = wa_pernr-pernr.
if sy-subrc eq 0.
wa_itab3-test_column = wa_test-test_column.
endif.
if wa_itab3 is not initial.
append wa_itab3 to it_tab3.
endif.
clear:wa_itab3, wa_pernr, wa_test.
endloop.
Now your it_tab3 is desired output.
If you have any query, let me know.
Regards,
Sudeesh Soni