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(PO2020.TOTAL_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 PF ON PO.PF_CODE = PF.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;