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SELECT ROUND(LAT_N, 4)
FROM (
SELECT LAT_N,
ROW_NUMBER() OVER (ORDER BY LAT_N) AS row_num,
COUNT(*) OVER () AS total_count
FROM STATION
) temp
WHERE row_num = (total_count + 1) / 2
OR row_num = (total_count / 2) + 1;
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Weather Observation Station 20
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SELECT ROUND(LAT_N, 4) FROM ( SELECT LAT_N, ROW_NUMBER() OVER (ORDER BY LAT_N) AS row_num, COUNT(*) OVER () AS total_count FROM STATION ) temp WHERE row_num = (total_count + 1) / 2 OR row_num = (total_count / 2) + 1;