SELECT a.都道府県コード,
       a.都道府県名,
       a.総人口2015年,
       a.総人口2020年,
        ROUND(CAST(a.総人口2020年 AS REAL) / CAST(a.総人口2015年 AS REAL) * 100
    )  AS 人口増加率
FROM(
SELECT pt.PF_CODE AS 都道府県コード,
       p.PF_NAME  AS 都道府県名,
       (SELECT p2.TOTAL_AMT FROM POPU_TRANSITION p2 
         WHERE p2.SURVEY_YEAR = '2015' AND p2.PF_CODE = pt.PF_CODE) AS '総人口2015年',
       (SELECT p2.TOTAL_AMT FROM POPU_TRANSITION p2 
         WHERE p2.SURVEY_YEAR = '2020' AND p2.PF_CODE = pt.PF_CODE) AS '総人口2020年'
  FROM POPU_TRANSITION pt
  INNER JOIN PREFECTURE p
    ON pt.PF_CODE = p.PF_CODE
 GROUP BY pt.PF_CODE, p.PF_NAME
 ) a
WHERE 人口増加率 > 100
ORDER BY 人口増加率 DESC , a.都道府県コード ASC