select
    HOSPITALIZATION.PF_CODE as 都道府県コード,
    PREFECTURE.PF_NAME as 都道府県名,
    round(100.0 * INP_YES / (INP_YES + INP_NO + UNIDENTIFIED), 1) as 入院率
from HOSPITALIZATION
inner join PREFECTURE on HOSPITALIZATION.PF_CODE = PREFECTURE.PF_CODE;