SELECT ROUND(AVG(TOTAL_VALUE)) SA_MEDIAN FROM (
SELECT C1.TOTAL_VALUE
FROM CONVENIENCE C1 CROSS JOIN CONVENIENCE C2
WHERE C1.SURVEY_YEAR = '2019'
AND C1.KIND_CODE = '100'
GROUP BY C1.TOTAL_VALUE
HAVING SUM(case when C1.TOTAL_VALUE >= C2.TOTAL_VALUE then 1 else 0 end) >= count(*)/2
and SUM(case when C1.TOTAL_VALUE <= C2.TOTAL_VALUE then 1 else 0 end) >= count(*)/2
)