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| id | name | amount |
|---|---|---|
| 3 | a | 8 |
| 4 | a | 3 |
| 5 | b | 1 |
SELECT 3
| id | name | amount |
|---|---|---|
| 3 | a | 8 |
| 5 | b | 1 |
SELECT 2
| id | name | amount |
|---|---|---|
| 3 | a | 8 |
| 4 | a | 3 |
| 5 | b | 1 |
SELECT 3
| id | name | amount |
|---|---|---|
| 3 | a | 8 |
| 5 | b | 1 |
SELECT 2