SELECT
 T.SURVEY_YEAR AS SV_YEAR
,P.PF_NAME AS PREFECTURE
,T.KIND
,T.AMT
FROM (
SELECT SURVEY_YEAR, PF_CODE, "小学校" AS KIND, 1 AS KO, SUM(ELEMENTARY) AS AMT FROM ENROLLMENT_STATUS WHERE SURVEY_YEAR = '2020' AND ELEMENTARY IS NOT NULL UNION
SELECT SURVEY_YEAR, PF_CODE, "中学校" AS KIND, 2 AS KO, SUM(MIDDLE)     AS AMT FROM ENROLLMENT_STATUS WHERE SURVEY_YEAR = '2020' AND MIDDLE IS NOT NULL UNION
SELECT SURVEY_YEAR, PF_CODE, "高校"   AS KIND, 3 AS KO, SUM(HIGH)       AS AMT FROM ENROLLMENT_STATUS WHERE SURVEY_YEAR = '2020' AND HIGH IS NOT NULL UNION
SELECT SURVEY_YEAR, PF_CODE, "短大"   AS KIND, 4 AS KO, SUM(JUNIOR_CLG) AS AMT FROM ENROLLMENT_STATUS WHERE SURVEY_YEAR = '2020' AND JUNIOR_CLG IS NOT NULL UNION
SELECT SURVEY_YEAR, PF_CODE, "大学"   AS KIND, 5 AS KO, SUM(COLLEGE)    AS AMT FROM ENROLLMENT_STATUS WHERE SURVEY_YEAR = '2020' AND COLLEGE IS NOT NULL UNION
SELECT SURVEY_YEAR, PF_CODE, "大学院" AS KIND, 6 AS KO, SUM(GRADUATE)   AS AMT FROM ENROLLMENT_STATUS WHERE SURVEY_YEAR = '2020' AND GRADUATE IS NOT NULL 
) AS T
INNER JOIN PREFECTURE AS P
ON T.PF_CODE = P.PF_CODE
ORDER BY
T.PF_CODE
,T.KO