select p.PF_CODE as 都道府県コード, p.PF_NAME as 都道府県名, round(cast(sum(INP_YES) as float) * 100 / cast((sum(INP_YES) + sum(INP_NO) + sum(UNIDENTIFIED)) as float), 1) as 入院率
from PREFECTURE p
join HOSPITALIZATION h on p.PF_CODE == h.PF_CODE
group by p.PF_CODE