Mysql 之根據經緯度按距離排序

一、方式一

st_distance 計算的結果單位是度，需要乘111195（地球半徑6371000*PI/180）是將值轉化爲米。
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

三、方式三

附近30KM內站點，並按照距離由近及遠排列
SELECT *,round(st_distance_sphere(point(lng,lat),point(116.382615,39.91024))/1000,2) as juli FROM a HAVING juli<30 ORDER BY juli ASC