SELECT
    T.PF_CODE 都道府県コード,
    T.PF_NAME 都道府県名,
    MAX(CASE T.RANK
            WHEN 1 THEN T.NATION_NAME
            ELSE ''
        END
    ) AS '1位 国名',
    MAX(CASE T.RANK
            WHEN 1 THEN T.AMT
            ELSE 0
        END
    ) AS '1位 人数',
    MAX(CASE T.RANK
            WHEN 2 THEN T.NATION_NAME
            ELSE ''
        END
    ) AS '2位 国名',
    MAX(CASE T.RANK
            WHEN 2 THEN T.AMT
            ELSE 0
        END
    ) AS '2位 人数',
    MAX(CASE T.RANK
            WHEN 3 THEN T.NATION_NAME
            ELSE ''
        END
    ) AS '3位 国名',
    MAX(CASE T.RANK
            WHEN 3 THEN T.AMT
            ELSE 0
        END
    ) AS '3位 人数',
    SUM(T.AMT) 合計人数
FROM (
SELECT
    RANK() OVER (PARTITION BY P.PF_CODE ORDER BY F.AMT DESC) RANK,
    P.PF_CODE,
    P.PF_NAME,
    N.NATION_CODE,
    N.NATION_NAME,
    F.AMT
FROM
    FOREIGNER F
INNER JOIN
    NATIONALITY N
ON
    F.NATION_CODE = N.NATION_CODE
    AND
    F.NATION_CODE <> '113'
LEFT OUTER JOIN
    PREFECTURE P
ON
    F.PF_CODE = P.PF_CODE
) T
GROUP BY
    T.PF_CODE,
    T.PF_NAME
ORDER BY
    合計人数 DESC,
    都道府県コード ASC
;