Hi everyone,
I wanted to create a column ID which is unique for every 12 months based on the scheduled start date and schedule due date. Is there any way to do this?
| SCHEDULE START DATE | SCHEDULE DUE DATE | ID |
| 14/4/2014 | 14/5/2014 | 1 |
| 14/5/2014 | 14/6/2014 | 1 |
| 14/6/2014 | 14/7/2014 | 1 |
| 14/7/2014 | 14/8/2014 | 1 |
| 14/8/2014 | 14/9/2014 | 1 |
| 14/9/2014 | 14/10/2014 | 1 |
| 14/10/2014 | 14/11/2014 | 1 |
| 14/11/2014 | 14/12/2014 | 1 |
| 14/12/2014 | 14/1/2015 | 1 |
| 14/1/2015 | 14/2/2015 | 1 |
| 14/2/2015 | 14/3/2015 | 1 |
| 14/3/2015 | 14/4/2015 | 2 |
| 14/4/2015 | 14/5/2015 | 2 |
| 14/5/2015 | 14/6/2015 | 2 |
| 14/6/2015 | 14/7/2015 | 2 |
| 14/7/2015 | 14/8/2015 | 2 |
| 14/8/2015 | 14/9/2015 | 2 |
| 14/9/2015 | 14/10/2015 | 2 |
| 14/10/2015 | 14/11/2015 | 2 |
| 14/11/2015 | 14/12/2015 | 2 |
| 14/12/2015 | 14/1/2016 | 2 |
| 14/1/2016 | 14/2/2016 | 2 |
| 14/2/2016 | 14/3/2016 | 2 |
| 14/3/2016 | 14/4/2016 | |
| 14/4/2016 | 14/5/2016 | |
| 14/5/2016 | 14/6/2016 | |
| 14/6/2016 | 14/7/2016 | |
| 14/7/2016 | 14/8/2016 | |
| 14/8/2016 | 14/9/2016 | |
| 14/9/2016 | 14/10/2016 | |
| 14/10/2016 | 14/11/2016 | |
| 14/11/2016 | 14/12/2016 | |
| 14/12/2016 | 14/1/2017 | |
| 14/1/2017 | 14/2/2017 | |
| 14/2/2017 | 14/3/2017 | |
| 14/3/2017 | 14/4/2017 | |
| 14/4/2017 | 14/5/2017 | |
| 14/5/2017 | 14/6/2017 | |
| 14/6/2017 | 14/7/2017 | |
| 14/7/2017 | 14/8/2017 | |
| 14/8/2017 | 14/9/2017 | |
| 14/9/2017 | 14/10/2017 | |
| 14/10/2017 | 14/11/2017 | |
| 14/11/2017 | 14/12/2017 | |
| 14/12/2017 | 14/1/2018 | |
| 14/1/2018 | 14/2/2018 | |
| 14/2/2018 | 14/3/2018 | |
| 14/3/2018 | 14/4/2018 | |
| 14/4/2018 | 14/5/2018 | |
| 14/5/2018 | 14/6/2018 | |
| 14/6/2018 | 14/7/2018 | |
| 14/7/2018 | 14/8/2018 | |
| 14/8/2018 | 14/9/2018 | |
| 14/9/2018 | 14/10/2018 | |
| 14/10/2018 | 14/11/2018 | |
| 14/11/2018 | 14/12/2018 | |
| 14/12/2018 | 14/1/2019 | |
| 14/1/2019 | 14/2/2019 | |
| 14/2/2019 | 14/3/2019 | |
| 14/3/2019 | 14/4/2019 | |