一、方式一

st_distance 计算的结果单位是度，需要乘111195（地球半径6371000*PI/180）是将值转化为米。
SELECT *,
(st_distance(point(lng,lat),point(116.3424590000,40.0497810000))*111195/1000 ) as juli FROM table ORDER BY juli ASC 

二、方式二

select *, ROUND(6378.138*2*ASIN(SQRT(POW(SIN(({$lat}*PI()/180-lat*PI()/180)/2),2) COS({$lat}*PI()/180)*COS(lat*PI()/180)*POW(SIN(({$lng}*PI()/180-lng*PI()/180)/2),2)))*1000) AS juli from table order by juli asc