PHP 复杂的查询，怎么加入排序。-PHP Tutorial-php.cn

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PHP 复杂的查询，怎么加入排序。

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Jun 20, 2016 pm 12:38 PM

  $latitude = $_GET['y'];
  $longitude = $_GET['x'];
  $distance = 500;
  $sql = "select * from " . $GLOBALS['ecs']->table('weixin_map') . " where sqrt( ( ((".$longitude."-Longitude)*PI()*12656*cos(((".$latitude."+Latitude)/2)*PI()/180)/180) * ((".$longitude."-Longitude)*PI()*12656*cos (((".$latitude."+Latitude)/2)*PI()/180)/180) ) + ( ((".$latitude."-Latitude)*PI()*12656/180) * ((".$latitude."-Latitude)*PI()*12656/180) ) )/2
我这个是查询500公里以前的商家信息，可是查出来了，但无法按近距离到远距离排序。
查具体方法。

回复讨论(解决方案)

怎么通过array，计算出所有信息的距离，然后再重新排序啊。

我的思路是，新建一个数组然后每条数据计算一次，计算距离，然后再通过这个数据来排序。
谁有空帮忙写出来。。。

select *, sqrt( ( ((".$longitude."-Longitude)*PI()*12656*cos(((".$latitude."+Latitude)/2)*PI()/180)/180) * ((".$longitude."-Longitude)*PI()*12656*cos (((".$latitude."+Latitude)/2)*PI()/180)/180) ) + ( ((".$latitude."-Latitude)*PI()*12656/180) * ((".$latitude."-Latitude)*PI()*12656/180) ) )/2 as dis
from 表 order by dis having dis

出错了，提示 having dis errno

$sql = "select *, sqrt( ( ((".$longitude."-Longitude)*PI()*12656*cos(((".$latitude."+Latitude)/2)*PI()/180)/180) * ((".$longitude."-Longitude)*PI()*12656*cos (((".$latitude."+Latitude)/2)*PI()/180)/180) ) + ( ((".$latitude."-Latitude)*PI()*12656/180) * ((".$latitude."-Latitude)*PI()*12656/180) ) )/2 as dis
from " . $GLOBALS['ecs']->table('weixin_map') . " group by dis having dis
这样可以排序了，但刚好相反了。。

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