XY.txt

DROP FUNCTION IF EXIST `GetDistance`;
DELIMITER $$
CREATE FUNCTION `GetDistance`
( 
GPSLng DECIMAL(12,6),
GPSLat DECIMAL(12,6),
Lng  DECIMAL(12,6),
Lat DECIMAL(12,6)
)
RETURNS DECIMAL(12,4) NO SQL

BEGIN
   DECLARE result DECIMAL(12,4);
   SET result=6371.004*ACOS(SIN(GPSLat/180*PI())*SIN(Lat/180*PI())+COS(GPSLat/180*PI())*COS(Lat/180*PI())*COS((GPSLng-Lng)/180*PI()));
   RETURN result;
END $$
DELIMITER $$


��ʽ���£���λ�ף�
��һ�㾭γ�ȣ�lng1 lat1
�ڶ��㾭γ�ȣ�lng2 lat2
round(6378.138*2*asin(sqrt(pow(sin(
(lat1*pi()/180-lat2*pi()/180)/2),2)+cos(lat1*pi()/180)*cos(lat2*pi()/180)*
pow(sin( (lng1*pi()/180-lng2*pi()/180)/2),2)))*1000)



���磺
SELECT store_id,lng,lat,
ROUND(6378.138*2*ASIN(SQRT(POW(SIN((22.299439*PI()/180-lat*PI()/180)/2),2)+COS(22.299439*PI()/180)*COS(lat*PI()/180)*POW(SIN((114.173881*PI()/180-lng*PI()/180)/2),2)))*1000)
AS
 juli
FROM store_info having juli > 500
ORDER BY juli DESC
LIMIT 100