select min(dbkey) from ix_spc_performance  perf ,
(select dbparentplanogramkey, DBParentProductKey
from ix_spc_performance
group by dbparentplanogramkey, DBParentProductKey
having count(*) >1
) a
where a.dbparentplanogramkey = perf.dbparentplanogramkey
and  a.DBParentProductKey = perf.DBParentProductKey
group by perf.dbparentplanogramkey, perf.DBParentProductKey;