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SELECT CAST(AVG(LAT_N) AS DECIMAL(10,4)) AS median_lat
FROM (
SELECT LAT_N,
ROW_NUMBER() OVER (ORDER BY LAT_N) AS rn,
COUNT(*) OVER () AS total_count
FROM STATION
) t
WHERE rn IN ((total_count + 1) / 2, (total_count + 2) / 2);
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Weather Observation Station 20
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SELECT CAST(AVG(LAT_N) AS DECIMAL(10,4)) AS median_lat FROM ( SELECT LAT_N, ROW_NUMBER() OVER (ORDER BY LAT_N) AS rn, COUNT(*) OVER () AS total_count FROM STATION ) t WHERE rn IN ((total_count + 1) / 2, (total_count + 2) / 2);