Hello,
I have the dataset bellow.
| Month | Doc. Number |
1 | 123456 |
| 1 | 456789 |
| 1 | 123456 |
| 2 | 987456 |
| 2 | 321456 |
I need to find any duplicate document number within the same period.
Based on my requirements, The rows highlighted, should be filtered as duplicates.
Thank you.