[Query carpiata] conto database

[nicola75ss]

select 
sum(case when valore1 < 1 then 1 else 0 end) as minori_1,
sum(case when valore1 between 1 and 2 then 1 else 0 end) as tra_1_e_2 ,
sum(case when valore1 > 2 then 1 else 0 end) as maggiori_2 
from .....