通过经纬度计算两点距离

mysql实现

SELECT
    NAME,
    ACOS(
     SIN(39.754257 * PI() / 180) * SIN(a.latitude * PI() / 180) + COS(39.754257 * PI() / 180) * COS(a.latitude * PI() / 180) * COS(
        a.longitude * PI() / 180 - 115.735067 * PI() / 180      
      )
    ) * 6371 AS 'distance'
FROM
    address a;