***SOMENTE PARA CODIGO DE BARRAS DUPLICADOS DA TABELA PROD


select codind from prod
group by codind
having Count(codind)>1

delete from prod
where codind in
  (select codind from prod
   group by codind
   having Count(codind)>1)
and not cod in
  (select Min(cod) from prod
   group by codind
   having Count(codind)>1)