By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
| ProductID | CategoryID | Date | ProductDistinctCount |
|---|---|---|---|
| 1 | 1 | 20210602 | 3 |
| 1 | 1 | 20210603 | 3 |
| 1 | 1 | 20210601 | 3 |
| 2 | 1 | 20210601 | 3 |
| 2 | 1 | 20210602 | 3 |
| 3 | 1 | 20210601 | 3 |
| 4 | 2 | 20210602 | 2 |
| 4 | 2 | 20210601 | 2 |
| 5 | 2 | 20210601 | 2 |