SELECT
    PT.PF_CODE AS 都道府県コード,
    P.PF_NAME AS 都道府県名,
    PT2.TOTAL_AMT AS 総人口２０１５年,
    PT.TOTAL_AMT AS 総人口２０２０年,
    ROUND (
        CAST(PT.TOTAL_AMT AS real) / CAST((PT2.TOTAL_AMT) AS real)*100
    ) AS 人口増加率
FROM POPU_TRANSITION AS PT
INNER JOIN POPU_TRANSITION AS PT2
    ON PT.PF_CODE = PT2.PF_CODE
    AND PT2.SURVEY_YEAR = 2015
    LEFT JOIN PREFECTURE AS P
        ON PT.PF_CODE = P.PF_CODE
WHERE PT.SURVEY_YEAR = 2020 
ORDER BY 人口増加率 DESC, 都道府県コード ASC;