这是一个表，要求累计金额 。表名t ，字段lsh，shangpinbh，jine。

流水号	商品编号	金额	累计金额
1	1001	2500	2500
2	1001	3000	5500
3	1004	4000	9500
4	1006	1000	10500
5	1007	2000	12500

 

select lsh,shangpinbh,jine,(select sum(jine) from t where shangpinbh=t1.shangpinbh and lsh <=t1.lsh) as 累计金额from t as t1;

mariadb> select lsh,shangpinbh,jine,
     (select sum(jine) from t where shangpinbh=t1.shangpinbh and lsh <=t1.lsh) as 累计金额
     from t as t1;
+-----+------------+-------+----------+
| lsh | shangpinbh | jine  | 累计金额 |
+-----+------------+-------+----------+
|   0 | 1002       | 5100  | 5100     |
|   1 | 1002       | 3500  | 8600     |
|   3 | 1002       | 10000 | 18600    |
|   4 | 2001       | 2560  | 2560     |
|   5 | 2010       | 4700  | 4700     |
+-----+------------+-------+----------+
5 rows in set (0.01 sec)