SQL按條件統計

 select InputOrgID ,
  sum(case EWClass when '1' then 1 else 0 end) as EWClass1,--統計1出現的次數
  sum(case EWClass when '2' then 1 else 0 end) as EWClass2,--統計2出現的次數
  sum(case status when '1' then 1 else 0 end) as status
from RISK_SIGNAL
group by InputOrgID