SELECT
    HOS.PF_CODE AS 都道府県コード,
    PRE.PF_NAME AS 都道府県名,
    ROUND(
        CAST(HOS.INP_YES AS REAL) 
        / CAST((HOS.INP_YES + HOS.INP_NO + HOS.UNIDENTIFIED) AS REAL)
        * 100
        ,1
    ) AS 入院率
FROM
    HOSPITALIZATION AS HOS
INNER JOIN  
    PREFECTURE AS PRE
        ON HOS.PF_CODE = PRE.PF_CODE
ORDER BY
    入院率 DESC,
    HOS.PF_CODE ASC;