我如何在MySQL中订购这个SELECT语句？

Question

cursor.execute("SELECT user_id FROM myapp_location WHERE\ 
     GLength(LineStringFromWKB(LineString(asbinary(utm), asbinary(PointFromWKB(point(%s, %s)))))) < %s"\ 
     ,(user_utm_easting, user_utm_northing, 500)); 

该查询选择距离当前用户500英尺内的用户。我如何按距离排列人物？ （glength）。第一个，最后一个。

你会如何改变这个查询？谢谢。

Answer 1

这里有一种方法

SELECT user_id 
    , GLength(LineStringFromWKB(LineString(asbinary(utm), asbinary(PointFromWKB(point(%s, %s)))))) as glength 
    FROM myapp_location 
HAVING glength < %s" 
ORDER BY glength desc