MySQL的：选择多行，但在1

Question

建立限制我有一个包含以下内容的表：

food || last_order_date 
------------------------- 
pizza || 2011-10-25 19:00 
========================= 
pasta || 2011-10-25 23:00 
========================= 
pizza || 2011-10-29 15:00 
========================= 
pasta || 2011-10-31 18:00 
========================= 

我想实现的是获得由last_order_date每种食品下令表。那么，结果将是：

food || last_order_date 
------------------------- 
pasta || 2011-10-31 18:00 
========================= 
pizza || 2011-10-29 15:00 
========================= 

我怎样才能做到这一点？我尝试了很多东西，但我得到的只是整张桌子上的订单，而不是每个食物元素。谢谢！

Answer 1

像这样（未测试）：

SELECT food, 
     MAX(last_order_date) AS max_last_order_date 
    FROM table 
GROUP BY food 
ORDER BY max_last_order_date DESC