+-------------+---------+--------+
| id_question | id_user | value  |
+-------------+---------+--------+
| 1           |   1     |   1000 |
| 1           |   1     |   2000 |
| 2           |   2     |   2200 |
| 2           |   2     |   1100 |
| 3           |   1     |   3000 |
+-------------+---------+--------+

+-------------+---------+--------+
| id_question | id_user | amount |
+-------------+---------+--------+
| 1           |   1     |   2    |
| 2           |   2     |   2    |
+-------------+---------+--------+