MySQL：选择多行，但在1上设置限制

Question

我有一张包含以下内容的表格：

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 
=========================

我想要达到的目的是获得一份由last_order_date为每种食物订购的餐桌。所以，结果将是：

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

我怎样才能实现这一目标？我尝试了很多东西，但我获得的只是整张桌子的订单，而不是每个食物元素。谢谢！

Answer 1

像这样（未经测试）：

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