本文介绍了如何从MySQL对每n条记录求和的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我从查询中得到以下结果:
I have a following result from query:
+---------------+------+------+------+------+------+------+------+-------+
| order_main_id | S36 | S37 | S38 | S39 | S40 | S41 | S42 | total |
+---------------+------+------+------+------+------+------+------+-------+
| 26 | 127 | 247 | 335 | 333 | 223 | 111 | 18 | 1394 |
| 26 | 323 | 606 | 772 | 765 | 573 | 312 | 154 | 3505 |
| 38 | 25 | 35 | 35 | 35 | 20 | NULL | NULL | 150 |
| 38 | 25 | 35 | 35 | 35 | 20 | NULL | NULL | 150 |
| 39 | 65 | 86 | 86 | 42 | 21 | NULL | NULL | 300 |
| 39 | 42 | 58 | 58 | 28 | 14 | NULL | NULL | 200 |
| 35 | 11 | 20 | 21 | 18 | 9 | 2 | NULL | 81 |
| 35 | 10 | 25 | 30 | 23 | 12 | 1 | NULL | 101 |
+---------------+------+------+------+------+------+------+------+-------+
我想在输入不同的order_main_id
之前插入一个SUM,就像这样的结果:
I would like to insert a SUM before enter different order_main_id
, it would be like this result:
+---------------+------+------+------+------+------+------+------+-------+
| order_main_id | S36 | S37 | S38 | S39 | S40 | S41 | S42 | total |
+---------------+------+------+------+------+------+------+------+-------+
| 26 | 127 | 247 | 335 | 333 | 223 | 111 | 18 | 1394 |
| 26 | 323 | 606 | 772 | 765 | 573 | 312 | 154 | 3505 |
| | 450 | 853 | 1107 | 1098 | 796 | 423 | 172 | 4899 |
| 38 | 25 | 35 | 35 | 35 | 20 | NULL | NULL | 150 |
| 38 | 25 | 35 | 35 | 35 | 20 | NULL | NULL | 150 |
| | 50 | 70 | 70 | 70 | 40 | NULL | NULL | 300 |
| 39 | 65 | 86 | 86 | 42 | 21 | NULL | NULL | 300 |
| 39 | 42 | 58 | 58 | 28 | 14 | NULL | NULL | 200 |
| | 107 | 144 | 144 | 70 | 35 | NULL | NULL | 500 |
| 35 | 11 | 20 | 21 | 18 | 9 | 2 | NULL | 81 |
| 35 | 10 | 25 | 30 | 23 | 12 | 1 | NULL | 101 |
| | 21 | 45 | 51 | 41 | 21 | 3 | NULL | 182 |
+---------------+------+------+------+------+------+------+------+-------+
如何使其成为可能?
推荐答案
您需要编写第二个查询,该查询使用GROUP BY order_main_id.
You'll need to write a second Query which makes use of GROUP BY order_main_id.
类似的东西:
SELECT sum(S41+...) FROM yourTable GROUP BY orderMainId
K
这篇关于如何从MySQL对每n条记录求和的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!