WITH ENROLLMENT_STACK AS (
    SELECT
        E_S.SURVEY_YEAR AS SV_YEAR,
        PF_CODE,
        '小学校' AS KIND,
        SUM(E_S.ELEMENTARY) AS AMT
    FROM
        ENROLLMENT_STATUS E_S
    WHERE
        E_S.SURVEY_YEAR = 2020
    GROUP BY
        E_S.SURVEY_YEAR,
        PF_CODE
    HAVING
        AMT IS NOT NULL
        
    UNION ALL
    
    SELECT
        E_S.SURVEY_YEAR AS SV_YEAR,
        PF_CODE,
        '中学校' AS KIND,
        SUM(E_S.MIDDLE) AS AMT
    FROM
        ENROLLMENT_STATUS E_S
    WHERE
        E_S.SURVEY_YEAR = 2020
    GROUP BY
        E_S.SURVEY_YEAR,
        PF_CODE
    HAVING
        AMT IS NOT NULL
    
    UNION ALL
    
    SELECT
        E_S.SURVEY_YEAR AS SV_YEAR,
        PF_CODE,
        '高校' AS KIND,
        SUM(E_S.HIGH) AS AMT
    FROM
        ENROLLMENT_STATUS E_S
    WHERE
        E_S.SURVEY_YEAR = 2020
    GROUP BY
        E_S.SURVEY_YEAR,
        PF_CODE
    HAVING
        AMT IS NOT NULL
    
    UNION ALL
    
    SELECT
        E_S.SURVEY_YEAR AS SV_YEAR,
        PF_CODE,
        '短大' AS KIND,
        SUM(E_S.JUNIOR_CLG) AS AMT
    FROM
        ENROLLMENT_STATUS E_S
    WHERE
        E_S.SURVEY_YEAR = 2020
    GROUP BY
        E_S.SURVEY_YEAR,
        PF_CODE
    HAVING
        AMT IS NOT NULL
        
    UNION ALL
    
    SELECT
        E_S.SURVEY_YEAR AS SV_YEAR,
        PF_CODE,
        '大学' AS KIND,
        SUM(E_S.COLLEGE) AS AMT
    FROM
        ENROLLMENT_STATUS E_S
    WHERE
        E_S.SURVEY_YEAR = 2020
    GROUP BY
        E_S.SURVEY_YEAR,
        PF_CODE
    HAVING
        AMT IS NOT NULL
        
    UNION ALL
    
    SELECT
        E_S.SURVEY_YEAR AS SV_YEAR,
        PF_CODE,
        '大学院' AS KIND,
        SUM(E_S.GRADUATE) AS AMT
    FROM
        ENROLLMENT_STATUS E_S
    WHERE
        E_S.SURVEY_YEAR = 2020
    GROUP BY
        E_S.SURVEY_YEAR,
        PF_CODE
    HAVING
        AMT IS NOT NULL
)

SELECT
    SV_YEAR,
    P.PF_NAME,
    KIND,
    AMT
FROM
    ENROLLMENT_STACK E_S
    INNER JOIN PREFECTURE P
        ON P.PF_CODE = E_S.PF_CODE
ORDER BY
    P.PF_CODE ASC
;