WITH pre AS
(
SELECT
    h.pf_code AS 都道府県コード
    ,p.pf_name AS 都道府県名
    ,round(CAST(h.inp_yes AS numeric) * 100/(h.inp_yes + h.inp_no + h.unidentified),-2) AS 入院率
FROM
    hospitalization h
    LEFT JOIN
    prefecture p
        ON
        h.pf_code = p.pf_code
)
SELECT
    都道府県コード
    ,都道府県名
    ,入院率
FROM
    pre
ORDER BY
    入院率
;