By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
| campaign | check_date | check_date |
|---|---|---|
| C001 | OK | OK |
| C002 | Error | Error |
| C003 | Error | OK |
| C004 | OK | Error |
| campaign | check_date | check_date |
|---|---|---|
| C001 | OK | OK |
| C002 | Error | Error |
| C003 | Error | OK |
| C004 | OK | Error |