Internal table - how to find double entries ?

HI,
im using an internal table with
field1
field2
field3
field4
field5
where field1 and field2 are key fields.
how can i find out duplicate(same key) entries with a select or read or loop?
thx,
gordon

hi
declare one more table of like that
as
let the table u have is tab1
now
data: record type i.
sort tab1 by field1 field2.
loop at tab1.
record = sy-index +1.
read table tab1 from index record where key field1 = tab1-field1
and
field2 = tab1-field2.
if sy-subrc = 0
write : 'This is duplicate record'.
endif.
endloop.
Cheers
Snehi

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