select
 a.PF_CODE as CODE,
 b.PF_NAME as NAME,
ROUND(CAST(coalesce(d.damt,0) AS REAL) / CAST(coalesce(f.famt,0) AS REAL) * 100,2) as PERCENTAGE
from DRINK_HABITS a
inner join PREFECTURE b
  on a.PF_CODE = b.PF_CODE
LEFT OUTER join
   (select c.PF_CODE,SUM(c.AMT) as damt from DRINK_HABITS c where c.CATEGORY_CODE = '120' and GENDER_CODE <> '1' group by c.PF_CODE) d
   on a.PF_CODE = d.PF_CODE
LEFT OUTER join
   (select e.PF_CODE,SUM(e.AMT) as famt from DRINK_HABITS e WHERE GENDER_CODE <> '1' group by e.PF_CODE) f
   on a.PF_CODE = f.PF_CODE
group by CODE,NAME
ORDER BY PERCENTAGE DESC,CODE DESC