SELECT
    PREFECTURE.PF_CODE AS 都道府県コード,
    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 LEFT OUTER JOIN PREFECTURE
ON
    PREFECTURE.PF_CODE = HOSPITALIZATION.PF_CODE
ORDER BY
    入院率 DESC, PREFECTURE.PF_CODE ASC;