select  
    PREFECTURE.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

order by 入院率 desc