# mysql 通过经纬度查询附近的地点位置(谷歌方案)

 1 SELECT
2   id, name,(
3     6371 * acos (
5       * cos( radians( lat ) )
7       + sin ( radians(60.000000) )
8       * sin( radians( lat ) )
9     )
10   ) AS distance
11 FROM t_demo
12 HAVING distance < 2
13 ORDER BY distance
14 LIMIT 0 , 20;    

The SQL statement that will find the closest 20 locations that are within a radius of 30 miles to the 78.3232, 65.3234 coordinate. It calculates the distance based on the latitude/longitude of that row and the target latitude/longitude, and then asks for only rows where the distance value is less than 30 miles, orders the whole query by distance, and limits it to 20 results. To search by kilometers instead of miles, replace 3959 with 6371.

posted @ 2017-10-18 15:53  张小三、  阅读(2042)  评论(0编辑  收藏  举报