SELECT
    PT.PF_CODE AS '都道府県コード'
    ,PF.PF_NAME AS '都道府県名'
    ,SUM(CASE WHEN PT.SURVEY_YEAR = '2015' THEN PT.TOTAL_AMT ELSE '0' END) AS '総人口2015年'
    ,SUM(CASE WHEN PT.SURVEY_YEAR = '2020' THEN PT.TOTAL_AMT ELSE '0' END) AS '総人口2020年'
    ,ROUND(
        SUM(CASE WHEN PT.SURVEY_YEAR = '2020' THEN CAST(PT.TOTAL_AMT AS FLOAT) ELSE '0' END)*100
        /
        SUM(CASE WHEN PT.SURVEY_YEAR = '2015' THEN CAST(PT.TOTAL_AMT AS FLOAT) ELSE '0' END)
        ,0)
     AS '人口増加率'


FROM
    POPU_TRANSITION PT
    INNER JOIN 
        PREFECTURE PF
    ON
        PF.PF_CODE=PT.PF_CODE
GROUP BY PT.PF_CODE
ORDER BY
    人口増加率 DESC
    ,PT.PF_CODE