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 PRE.PF_CODE = HOS.PF_CODE
ORDER BY 入院率 DESC;