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WITH CTE_ABC AS (
SELECT
LAT_N,
ROW_NUMBER() OVER (ORDER BY LAT_N ASC) AS row_asc,
ROW_NUMBER() OVER (ORDER BY LAT_N DESC) AS row_desc
FROM STATION
)
SELECT ROUND(AVG(LAT_N),4) AS median
FROM CTE_ABC
WHERE row_asc = row_desc OR row_asc = row_desc - 1
;
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Weather Observation Station 20
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WITH CTE_ABC AS ( SELECT LAT_N, ROW_NUMBER() OVER (ORDER BY LAT_N ASC) AS row_asc, ROW_NUMBER() OVER (ORDER BY LAT_N DESC) AS row_desc FROM STATION
) SELECT ROUND(AVG(LAT_N),4) AS median FROM CTE_ABC WHERE row_asc = row_desc OR row_asc = row_desc - 1 ;