每天的SQL计数上限（计数字符串）

Question

I have table like this http://pastebin.com/raw.php?i=miEpLUNU Every 30mins I'm inserting wind directions. Now what I want to do is I would like to do something like this but for each day and each station.

SELECT DIR_GORYCZKOWA, COUNT(*) AS COUNT_DIR, DATE_FORMAT(DATE_SYSTEM, '%Y-%m-%d') AS DATE 
FROM wind_direction
WHERE DATE_SYSTEM BETWEEN '2014-02-19' AND '2014-02-20'
GROUP BY DIR_GORYCZKOWA ORDER BY COUNT_DIR DESC LIMIT 1;

Is this even possible?

Answer 1

Try that:

 SELECT DIR_GORYCZKOWA, COUNT(*) AS COUNT_DIR, DATE_FORMAT(DATE_SYSTEM, '%Y-%m-%d') AS  DATE 
 FROM wind_direction
 GROUP BY DATE(DATE_SYSTEM)
 ORDER BY COUNT_DIR DESC LIMIT 1;

Answer 2

echo_Me's answer is correct assuming that the station is stored in column "DIR_GORYCZKOWA". Keep the where clause if you want to limit the data returned to a certain date range.

The query returning these results is correct http://pastebin.com/raw.php?i=QX2MGR5c

This is giving you the total count per station (DIR_GORYCZKOWA) per day