SELECT
PO.PF_CODE AS 都道府県コード
PO.PF_NAME AS 都道府県名
PO.TOTAL_AMT AS 総人口2015年
PO2020.TOTAL_AMT AS 総人口2020年
ROUND(
CAST(PO.2020TOTAL_AMT AS REAL) / CAST(PO.TOTAL_AMT AS REAL) * 100
) AS 人口増加率

FROM
POPU_TRANSITION AS PO
INNER JOIN PREFECTURE AS PR ON PO.PF_CODE = PR.PF_CODE
INNER JOIN POPU_TRANSITION AS PO2020
ON PO2020.PF_CODE = PO.PF_CODE 
AND PO2020.SURVEY_YEAR = 2020 

WHERE
    PO.SURVEY_YEAR = 2015
    AND PO2020.TOTAL_AMT >= PO.TOTAL_AMT
ORDER BY
    人口増軽率 DESC,
    都道府県コード ASC;