Hi,

> select BARCODE,NR_ORDINE,COUNT(*) from BARCODE
> GROUP BY BARCODE,NR_ORDINE
>
> the index is : BARCODE,NR_ORDINE
>
> Can someone help me?

The result of :

SELECT
BARCODE,
NR_ORDINE,
COUNT(*)
FROM
BARCODE
GROUP BY
BARCODE,
NR_ORDINE
HAVING
COUNT(*) > 1

is empty ?

Regards,
Arno