mysql order by 失效了？
我的表是地址和ip组成，都是char型的，这个表是我用其他表做成的，我想用order by 查看地址多少分布，我用的语句是

 select host,ip from a order by host desc limit 200;
可是出来的结果却不是按从多到少的顺序来的，很是混乱，我就搞不清楚了这是怎么了？怎么失效了吗，可是有些其他表没问题啊？
如图
+-------------------------------------+------------------+
| host | ip |
+-------------------------------------+------------------+
| http://yximg.mop.com | 60.29.242.112
  |
| http://y3.ifengimg.com | 121.194.1.117
  |
| http://y3.ifengimg.com | 58.205.224.142
  |
| http://y3.ifengimg.com | 113.57.252.238
  |
| http://y3.ifengimg.com | 59.175.130.246
  |
| http://y3.ifengimg.com | 59.175.130.53
  |
| http://y2.ifengimg.com | 59.175.130.106
  |
| http://y0.ifengimg.com | 59.173.15.238
  |
| http://y0.ifengimg.com | 59.175.131.159
  |
| http://y0.ifengimg.com | 59.175.131.238
  |
| http://y0.ifengimg.com | 219.139.25.81
  |


------解决方案--------------------
从多到少排序，在sql中对host进行分组统计数量，然后按数排序。
SELECT host, count(ip) n FROM table1 GROUP BY(host) ORDER BY n desc