MySQL根据经纬度按距离排序
1、新建表
DROP TABLE IF EXISTS `customer`; CREATE TABLE `customer` ( `id` int(11) unsigned NOT NULL auto_increment COMMENT '自增主键', `name` varchar(50) NOT NULL COMMENT '名称', `lon` double(9,6) NOT NULL COMMENT '经度', `lat` double(8,6) NOT NULL COMMENT '纬度', PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8 COMMENT='商户表';
2、插入数据
INSERT INTO `customer` VALUES ('1', '天津市区', '117.315575', '39.133462'); INSERT INTO `customer` VALUES ('2', '北京市区', '116.407999', '39.894073'); INSERT INTO `customer` VALUES ('3', '保定', '115.557124', '38.853490'); INSERT INTO `customer` VALUES ('4', '石家庄', '114.646458', '38.072369'); INSERT INTO `customer` VALUES ('5', '昌平区1', '116.367180', '40.009561'); INSERT INTO `customer` VALUES ('6', '海淀区2', '116.313425', '39.973078'); INSERT INTO `customer` VALUES ('7', '海淀区1', '116.329236', '39.987231');
3、计算方法
一:
SELECT *, ROUND( 6378.138 * 2 * ASIN( SQRT( POW( SIN( ( 40.0497810000 * PI() / 180 - lat * PI() / 180 ) / 2 ), 2 ) + COS(40.0497810000 * PI() / 180) * COS(lat * PI() / 180) * POW( SIN( ( 116.3424590000 * PI() / 180 - lon * PI() / 180 ) / 2 ), 2 ) ) ) ) AS juli FROM customer ORDER BY juli ASC
二:
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 (lon,lat),point (116.3424590000,40.0497810000))*111195/1000 )as juli FROM customer ORDER BY juli ASC