SELECT SV_YEAR,PREFECTURE,KIND,AMT FROM(
SELECT
    SURVEY_YEAR AS SV_YEAR,
    PF_NAME AS PREFECTURE,
    '小学校' AS KIND,
    SUM(ELEMENTARY) AS AMT, P.PF_CODE
FROM 
PREFECTURE P LEFT JOIN ENROLLMENT_STATUS E ON P.PF_CODE = E.PF_CODE
WHERE E.SURVEY_YEAR = 2020
GROUP BY SURVEY_YEAR, P.PF_CODE
UNION
SELECT
    SURVEY_YEAR AS SV_YEAR,
    PF_NAME AS PREFECTURE,
    '中学校' AS KIND,
    SUM(MIDDLE) AS AMT, P.PF_CODE
FROM 
PREFECTURE P LEFT JOIN ENROLLMENT_STATUS E ON P.PF_CODE = E.PF_CODE
WHERE E.SURVEY_YEAR = 2020
GROUP BY SURVEY_YEAR, P.PF_CODE
UNION
SELECT
    SURVEY_YEAR AS SV_YEAR,
    PF_NAME AS PREFECTURE,
    '高校' AS KIND,
    SUM(HIGH) AS AMT, P.PF_CODE
FROM 
PREFECTURE P LEFT JOIN ENROLLMENT_STATUS E ON P.PF_CODE = E.PF_CODE
WHERE E.SURVEY_YEAR = 2020
GROUP BY SURVEY_YEAR, P.PF_CODE
UNION
SELECT
    SURVEY_YEAR AS SV_YEAR,
    PF_NAME AS PREFECTURE,
    '短大' AS KIND,
    SUM(JUNIOR_CLG) AS AMT, P.PF_CODE
FROM 
PREFECTURE P LEFT JOIN ENROLLMENT_STATUS E ON P.PF_CODE = E.PF_CODE
WHERE E.SURVEY_YEAR = 2020
GROUP BY SURVEY_YEAR, P.PF_CODE
UNION
SELECT
    SURVEY_YEAR AS SV_YEAR,
    PF_NAME AS PREFECTURE,
    '大学' AS KIND,
    SUM(COLLEGE) AS AMT, P.PF_CODE
FROM 
PREFECTURE P LEFT JOIN ENROLLMENT_STATUS E ON P.PF_CODE = E.PF_CODE
WHERE E.SURVEY_YEAR = 2020
GROUP BY SURVEY_YEAR, P.PF_CODE
UNION
SELECT
    SURVEY_YEAR AS SV_YEAR,
    PF_NAME AS PREFECTURE,
    '大学院' AS KIND,
    SUM(GRADUATE) AS AMT, P.PF_CODE
FROM 
PREFECTURE P LEFT JOIN ENROLLMENT_STATUS E ON P.PF_CODE = E.PF_CODE
WHERE E.SURVEY_YEAR = 2020
GROUP BY SURVEY_YEAR, P.PF_CODE
) t1
WHERE AMT IS NOT NULL
ORDER BY PF_CODE ASC;