mysql - Error Cast Converting SQL

Question

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 
from map_dati_trasformati 
where cod_mappatura = 'CARICA_NOL_CSV' 
AND CAMPO30 <> 0 
GROUP BY campo1, campo2, campo76, campo78, campo11 , 
        campo8, campo13, campo30  

this conversion reply me this error

Conversion failed when converting the varchar value 'AAT Rate' to data type int.

what is the problem?

Thanks in advance

Answer 1

Only thing that pops to the eye is the upper case AS and the same column alias (by default mysql is not case sensitive). Can you try it like this ?

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