php - 如何绑定字符串列数据

Question

我想编写一个 php 脚本来比较数据库中的行，然后如果 payment_id 匹配，则将这些值相加。基于payment_id：

例子：

   +----+------------+-----------+--------+
   | id | payment_id | cheque_id | amount |
   +----+------------+-----------+--------+
   |  1 | 1000       | MB101     | 20     |
   |  2 | 1000       | MB102     | 20     |
   |  3 | 1111       | MB113     | 20     |
   +----+------------+-----------+--------+

需要结果

   +------+--------------+----+
   | 1000 |  MB101/MB102 | 40 |
   | 1111 |  MB113       | 20 |
   +------+--------------+----+

尝试将检查列合并为字符串。对于“金额”列，我知道应该使用 SUM。

任何建议表示赞赏，

谢谢

Answer 1

采用GROUP BY

select payment_id,group_concat(cheque_id SEPARATOR '/') as cheque_ids,
SUM(amount) as amount
FROM table name
GROUP BY payment_id

Answer 2

我找到了解决方案

SELECT payment_id, group_concat(cheque_id SEPARATOR '/') AS cheque_ids,
SUM(amount) AS amount
FROM tbl_name
GROUP BY payment_id