select h.PF_CODE as '都道府県コード',p.PF_NAME as '都道府県',
    round(cast(h.INP_YES *100 as real)/cast(h.INP_YES+h.INP_NO+h.UNIDENTIFIED as real)) as '入院率'
        from HOSPITALIZATION h
            left join PREFECTURE p
                on h.PF_CODE == p.PF_CODE;