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| id | campaign | event_type | event_date | quantity |
|---|---|---|---|---|
| 1 | C001 | offered | 2019-04-10 | 500 |
| 2 | C001 | ordered | 2019-04-16 | 450 |
| 3 | C001 | stored | 2019-04-18 | 450 |
| 4 | C002 | offered | 2019-08-14 | 700 |
| 5 | C002 | ordered | 2019-09-04 | 730 |
| 6 | C002 | stored | 2019-09-15 | 800 |