SELECT round(avg(TOTAL_VALUE)) as SA_MEDIAN
FROM (SELECT TOTAL_VALUE
      FROM CONVENIENCE
      where 
        SURVEY_YEAR = '2019'
        and KIND_CODE = '100'
      ORDER BY TOTAL_VALUE
      LIMIT 2 - (SELECT COUNT(*) FROM CONVENIENCE where SURVEY_YEAR = '2019' and KIND_CODE = '100') % 2    -- odd 1, even 2
      OFFSET (SELECT (COUNT(*) - 1) / 2 FROM CONVENIENCE where SURVEY_YEAR = '2019' and KIND_CODE = '100'))