By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
2 rows affected
id |
---|
1 |
2 |
4 rows affected
id | main_id |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 2 |
1 rows affected
id |
---|
1 |
12 |
id | main_id |
---|---|
1 | 1 |
2 | 1 |
3 | 12 |
4 | 12 |
2 rows affected
id |
---|
1 |
2 |
4 rows affected
id | main_id |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 2 |
1 rows affected
id |
---|
1 |
12 |
id | main_id |
---|---|
1 | 1 |
2 | 1 |
3 | 12 |
4 | 12 |