WITH CONVENIENCE_TEMP AS (
    SELECT TOTAL_VALUE
    FROM CONVENIENCE
    WHERE SURVEY_YEAR=2019 AND KIND_CODE='100'
    ORDER BY TOTAL_VALUE ASC
)
SELECT ROUND(AVG(TOTAL_VALUE)) AS SA_MEDIAN
FROM (
    SELECT TOTAL_VALUE
    FROM CONVENIENCE_TEMP
    LIMIT 2 - (SELECT COUNT(*) FROM CONVENIENCE_TEMP) % 2
    OFFSET (SELECT (COUNT(*) - 1) / 2 FROM CONVENIENCE_TEMP)
)