By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
5 rows affected
| customer | item1 | item2 | item3 | item4 |
|---|---|---|---|---|
| 2 | 5 | 11 | null | null |
| 3 | 7 | null | 9 | null |
| 5 | 7 | 13 | 9 | null |
5 rows affected
| customer | item1 | item2 | item3 | item4 |
|---|---|---|---|---|
| 2 | 5 | 11 | null | null |
| 3 | 7 | null | 9 | null |
| 5 | 7 | 13 | 9 | null |