有如下表
|
id |
money |
|
1 |
10 |
|
2 |
20 |
|
3 |
30 |
|
4 |
40 |
求出如下数据
|
id |
money |
cum |
|
1 |
10 |
10 |
|
2 |
20 |
30 |
|
3 |
30 |
60 |
|
4 |
40 |
100 |
建表
CREATE TABLE cum_demo
(id INT,money INT,PRIMARY KEY (id))
插入数据
insert into cum_demo(id,money)
values (1,10),(2,20),(3,30),(4.40);
求累加
SELECT a.id,a.money,SUM(lt.money) as cum
FROM cum_demo a JOIN cum_demo lt
ON a.id >= lt.id
GROUP BY a.money
ORDER BY id
结果
| id | money | cum |
| 1 | 10 | 10 |
| 2 | 20 | 30 |
| 3 | 30 | 60 |
| 4 | 40 | 100 |