Mysql按分钟查询、选择、分组、求和

Question

我有一个这样的数据库表:

id | donation_type | donation_amount | time_inserted
1    em1              20                2012-12-07 10:01:00
2    em1              50                2012-12-07 10:01:00
3    em1              100               2012-12-07 10:01:00
4    em1              150               2012-12-07 10:02:00
5    em1              100               2012-12-07 10:02:00
6    em1              30                2012-12-07 10:02:00
7    em1              40                2012-12-07 10:03:00
8    em1              65                2012-12-07 11:16:00

我想要一个查询来计算每分钟有多少捐款。
我还想总结那一分钟的捐款金额。

所以我想返回的结果(使用上表将是):

10:00:01 => 3, amount => 170 # 3 donations in 10:01:00, totaling £170
10:00:02 => 3, amount => 280 # 3 donations in 10:02:00, totaling £280
10:00:03 => 1, amount => 40 # 1 donation in 10:03:00, totaling £40
11:16:00 => 1, amount => 65 # 1 donation in 11:16:00, totaling £40

编辑 - 我希望由 SQL 查询返回的示例

# Example of what I would like returned..

time                  |  donation_count  | donation_sum_in_minute
2012-12-07 10:01:00           3                  170
2012-12-07 10:02:00           3                  280
2012-12-07 10:03:00           1                  40
2012-12-07 11:16:00           1                  65  #the next hour!

我正在使用以下查询获取自上午 10 点以来的捐款总额。但我也想按分钟对它们进行分组，以给我上面的结果示例。

SELECT SUM(donation_amount) 
FROM `DONATION` 
WHERE `time_inserted` > '2012-12-07 10:00:00' 
AND `donation_type` = 'em1';
Returns: 807,563 # the total sum of donations since 10am today.

Answer 1

SELECT 
  SUM(donation_amount) AS total_donation_amount,
  EXTRACT(YEAR from time_inserted) AS year,
  EXTRACT(MONTH from time_inserted) AS month,
  EXTRACT(DAY from time_inserted) AS day,
  EXTRACT(HOUR from time_inserted) AS hour,
  EXTRACT(MINUTE from time_inserted) AS minute
FROM `DONATION`
WHERE `time_inserted` > '2012-12-07 10:00:00' 
AND `donation_type` = 'em1'
GROUP BY year, month, day, hour, minute;