Dear Experts,
Thank you very much for your support and suggestions.
i completed the task, again thanks for your kind help.
what i did is,
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Data:
itab- internal tabl which has got data.
wa_itab-
itab1- temp table of same type itab.
wa_itab1
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loop itab into wa_itab
read table itab1 into wa_itab1 with key (give fields)
if sy-subrc eq 0
<duplicate record found>
endif.
else
<remaining statements/ operations with itab.>
endif.
append wa_itab to itab1.
endloop.
thank you very much for your kind help and support experts