Chyba Cast Converting SQL

Jediná věc, která padne do oka, je velká písmena AS a stejný alias sloupce (ve výchozím nastavení mysql nerozlišuje velká a malá písmena). Můžete to zkusit takto?

select campo1 as AGR_Number, campo2  as fattura, 
    campo76 as cod_periodo, campo78 as cod_scenario, 
    campo11 as origine, campo8 as Stazione,     
    campo13 as agent, campo30 as AAT_RATE, 
    sum (cast(campo30 as numeric (9,2))) as AAT_rate_sum 
from map_dati_trasformati 
where cod_mappatura = 'CARICA_NOL_CSV' 
AND CAMPO30 <> 0 
GROUP BY campo1, campo2, campo76, campo78, campo11 , 
        campo8, campo13, campo30