By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
SELECT 10
| id | col | grp |
|---|---|---|
| 1 | 0 | 1 |
| 2 | 0 | 1 |
| 3 | 0 | 1 |
| 4 | 1 | 2 |
| 5 | 1 | 2 |
| 6 | 1 | 2 |
| 7 | 0 | 3 |
| 8 | 0 | 3 |
| 9 | 1 | 4 |
| 10 | 0 | 5 |
SELECT 10
SELECT 10
| id | col | grp |
|---|---|---|
| 1 | 0 | 1 |
| 2 | 0 | 1 |
| 3 | 0 | 1 |
| 4 | 1 | 2 |
| 5 | 1 | 2 |
| 6 | 1 | 2 |
| 7 | 0 | 3 |
| 8 | 0 | 3 |
| 9 | 1 | 4 |
| 10 | 0 | 5 |
SELECT 10