Question

            col1      col2
           | 2015-02-01  12 
           | 2015-02-01  10 
           | 2015-02-01   5 
           | 2015-02-02   8 
           | 2015-02-03  25 
           | 2015-02-03  10 
           | 2015-02-04  20

以上是我所拥有的表格样本。我希望在给定指定范围的情况下获得col2的总和。如果我在01-02-2015到03-02-2015之间获取总和（col2）记录，那么我的输出应该是，

           | 2015-02-01  27 
           | 2015-02-02   8 
           | 2015-02-03  35

是否有可能在mysql中实现这一点？

Answer 1

如果col1是DATE列，则可以使用此查询：

SELECT   col1, SUM(col2) AS sum_of_col2
FROM     tablename
WHERE    col1 BETWEEN '2015-02-01' AND '2015-02-03'
GROUP BY col1

如果col1是DATETIME列，并且包含DATE但也包含TIME信息，则应使用此：

SELECT
  DATE(col1) AS date_of_col1,
  SUM(col2) AS sum_of_col2
FROM
  tablename
WHERE
  col1>='2015-02-01' AND
  col1<'2015-02-03' + INTERVAL 1 DAY
GROUP BY
  DATE(col1)

Answer 2

SELECT SUM(col2) 
FROM table_name 
WHERE col1 BETWEEN '2015-02-01' AND '2015-02-03'
GROUP BY col1

Answer 3

您可以在clause之间使用分组来获得答案：

 SELECT col1, sum(col2) as col2 FROM test where col1 BETWEEN '01-02-15' AND '03-02-15' GROUP BY col1

如何在mysql中获取与日期有关的记录总和

3 个答案: