I have a table named station
having a column LAT_N
. I am trying to get the median of LAT_N
.
So here is my query:
select
case when count(Lat_N)%2=0 then (select (Lat_N from station limit (1,ceil(count(Lat_N)/2))+ select (Lat_N from station limit (1,floor(count(Lat_N)/2)))))
else (Select Lat_N from station limit(1,floor(count(Lat_N)/2)+1))
end
from station;
Try following query:
SELECT avg(tmp1.LAT_N) as median_LAT FROM (
SELECT @rownum:=@rownum+1 as row_number, s.val
FROM station s, (SELECT @rownum:=0) r
ORDER BY s.LAT_N
) as tmp1,
(
SELECT count(*) as total_rows
FROM station s
) as tmp2
AND tmp1.row_number in ( floor((total_rows+1)/2), floor((total_rows+2)/2) );
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