Hi!
Try this:
SELECT doc_number
zparv
employee
INTO TABLE it_zsd_ds01
FOR ALL ENTRIES IN source_package
WHERE doc_number = source_package-doc_number AND
zparv IN ('ZJ', 'KB').
IF sy-subrc EQ 0.
SORT it_zsd_ds01 BY doc_number zparv employee.
DELETE ADJACENT DUPLICATES FROM it_zsd_ds01 COMPARING doc_number zparv employee
ENDIF.
LOOP source_package ASSIGNING <source_fields>.
READ TABLE it_zsd_ds01 INTO wa_zsd_ds01
WITH KEY doc_number = <source_fields>-doc_number
zparv = <source_fields>-zparv
BINARY SEARCH.
IF sy-subrc EQ 0.
"your assign, for example.
<source_fields>-employee = wa_zsd_ds01-employee.
ENDIF.
ENDLOOP.
Regards.
