MySQL的GROUP BY和排序每組

Question

我有如下表：

ID NAME TIME 
1 A 0 
2 A 3 
3 B 1

我使用下面的查詢產生：

SELECT * FROM `table` GROUP BY `NAME` 

ID NAME TIME 
1 A 0 
3 B 1

而且我想用GROUP BY生成一個結果如下（按TIME列排序）：

ID NAME TIME 
2 A 3 
3 B 1

Answer 1

SELECT NAME, MAX(TIME) as TIME 
FROM table 
GROUP BY time 
ORDER BY time DESC 

Answer 2

那麼，你必須決定你想看到的ID和組後的時間字段。作爲一個例子，我將選擇MAX（ID）和SUM（時間），然後按總時間降序排序。

SELECT MAX(id), name, SUM(time) AS totaltime 
FROM YourTableName 
GROUP BY name 
ORDER BY totaltime DESC 

希望這有助於。

Answer 3

嘗試從這裏http://www.cafewebmaster.com/mysql-order-sort-group這個解決方案，它能夠解決我的問題太:)

樣品：

SELECT * FROM 

(
select * from `my_table` order by timestamp desc 
) as my_table_tmp 

group by catid 

order by nid desc 

Answer 4

select * from (select * from table order by TIME DESC) t group by NAME