SELECT
    A.PF_CODE as '都道府県コード',
    B.PF_NAME as '都道府県名',
    ROUND(
        1.0 * A.INP_YES / (A.INP_YES + A.INP_NO + A.UNIDENTIFIED),
        2
    ) as C
FROM
    HOSPITALIZATION as A
INNER JOIN
    PREFECTURE as B
WHERE
    A.PF_CODE = B.PF_CODE
ORDER BY
    C DESC
;