要根据另一列中的日期对列中的值进行求和并对其进行分组

Question

我在数据库中具有下表。我希望能够获得价值列的总和，但仅基于日期。

+-------+---------+------------+ 
| ID | value | date  | 
+-------+---------+------------+ 
| 1 | 3  | 2011-12-22 | 
| 1 | 2  | 2011-12-22 | 
| 1 | 4  | 2011-12-22 | 
| 1 | 2  | 2012-01-01 | 
+-------+---------+------------+ 

这应该是

+-------+---------+------------+ 
| ID | value | date  | 
+-------+---------+------------+ 
| 1 | 9  | 2011-12-22 | 
| 1 | 2  | 2012-01-01 | 
+-------+---------+------------+ 

谁能帮助？

Answer 1

Select id,sum(`value`) `value` , DATE(`date`) from table_name group by DATE(`date`); 

Answer 2

SELECT ID, SUM(value), date FROM table_name GROUP BY date;