SELECT
    PREFECTURE.PF_CODE AS 都道府県コード,
    PREFECTURE.PF_NAME AS 都道府県名,
    ROUND(HOSPITALIZATION.INP_YES * 100 
        / (HOSPITALIZATION.INP_YES +
        HOSPITALIZATION.INP_NO +
        HOSPITALIZATION.UNIDENTIFIED))
    AS 入院率
FROM
    HOSPITALIZATION,
    PREFECTURE
WHERE
    HOSPITALIZATION.PF_CODE = PREFECTURE.PF_CODE
ORDER BY
    入院率 DESC,
    HOSPITALIZATION.PF_CODE ASC