select
    prefecture.pf_code,
    prefecture.pf_name,
    round(
        100.0 * sum(case when category_code = '120' then amt else 0 end) /
            sum(case when category_code = '110' then amt else 0 end),
        1
    ) as PERCENTAGE
from
    drink_habits
    inner join prefecture
    using (pf_code)
where
    gender_code in ('2', '3')
group by
    pf_code
order by
    percentage desc,
    prefecture.pf_code desc
;