sql 计算两个经纬度点之间的距离

//存储过程
CREATE FUNCTION [f_GetDistance]
(
@GPSLng DECIMAL(12,6),
@GPSLat DECIMAL(12,6)
)
RETURNS DECIMAL(12,4)
AS
BEGIN
DECLARE @result DECIMAL(12,4)
SELECT @result = 6378137.0*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
GO

//查询语句
select *,(6378137.0*ACOS(SIN(@GPSLat/180*PI())*SIN(Lat/180*PI())+COS(@GPSLat/180*PI())*COS(Lat/180*PI())*COS((@GPSLng-Lng)/180*PI()))) as distance from tab_address