SELECT
    HOSPITALIZATION.PF_CODE AS 都道府県コード,
    PREFECTURE.PF_NAME AS 都道府県名,
    ROUND(100.0 * HOSPITALIZATION.INP_YES / (HOSPITALIZATION.INP_YES + HOSPITALIZATION.INP_NO + HOSPITALIZATION.UNIDENTIFIED), 1) AS 入院率
FROM HOSPITALIZATION
LEFT JOIN PREFECTURE ON PREFECTURE.PF_CODE = HOSPITALIZATION.PF_CODE
ORDER BY 入院率 DESC, 都道府県コード;