We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. SQL
  3. Aggregation
  4. Weather Observation Station 20
  5. Discussions

Weather Observation Station 20

  • oscar_sandin
     + 0 comments

    SET @Num_row := -1;

    SELECT

    ROUND(AVG(S.LAT_N),4) AS AVG_LAT

FROM (
    SELECT 
        @Num_row := @Num_row + 1 AS Num_row,
        LAT_N

            FROM STATION
            ORDER BY LAT_N ASC) AS S

    WHERE Num_row IN (FLOOR(@Num_row/2),CEIL(@Num_row/2));

                FROM STATION
            ORDER BY LAT_N ASC) AS S

    WHERE Num_row IN (FLOOR(@Num_row/2),CEIL(@Num_row/2));