Question

*我已经编辑了这篇文章（问题是'％d。％m。％Y％h：％i：％s'就像一半）

但是，我还是不明白：/
这工作正常，并按照'desc'顺序选择：

SELECT monitor.data_activity FROM monitor, player WHERE monitor.player_id = player.id AND monitor.player_id = 1
      AND (STR_TO_DATE(monitor.data_activity, '%d.%m.%Y') BETWEEN '2014-10-31' AND '2014-11-01') 
      ORDER BY UNIX_TIMESTAMP(STR_TO_DATE(monitor.data_activity, '%d.%m.%Y %h:%i:%s')) DESC;

但如果我将（AND monitor.player_id = 1）更改为（AND monitor.cord ='1：1：1'），其中cord是varchar10

SELECT monitor.data_activity FROM monitor, player WHERE monitor.player_id = player.id AND monitor.cord = '1:1:1'
      AND (STR_TO_DATE(monitor.data_activity, '%d.%m.%Y') BETWEEN '2014-10-31' AND '2014-11-01') 
      ORDER BY UNIX_TIMESTAMP(STR_TO_DATE(monitor.data_activity, '%d.%m.%Y %h:%i:%s')) DESC;

它打破了我的ORDER BY：

31.10.2014 20:35:27   
01.11.2014 18:20:01   
31.10.2014 00:55:43   
31.10.2014 14:41:17   
31.10.2014 21:07:24    
01.11.2014 19:05:10

Answer 1

这是巧合。两个order by表达式仅按日期排序。在一种情况下，它恰好也按正确的顺序排列时间。你可以使用：

order by STR_TO_DATE(monitor.data_activity, '%d.%m.%Y %H:%i:%s')

MySql日期字符串ORDER

1 个答案: