21.mysql分组累加

1.数据表结构

2.目标效果（以type值作为分组条件，分组累加）

 

3.sql语句

SELECT id, type, money, (SELECT SUM(money) FROM cum_demo WHERE type = A.type AND id <= A.Id) totalMin FROM cum_demo A ORDER BY A.type,A.id;

转载于:https://www.cnblogs.com/Nick-Hu/p/9367752.html