| ------------ | ------------- | ---------------- | ---- | --- | ------- | --------------- |
| id | sequential ID | int(10) unsigned | NO | PRI | NULL | auto_increment |
| iid | item.id | int(10) unsigned | NO | MUL | 0 | |
| ------------ | ------------- | ---------------- | ---- | --- | ------- | --------------- |
| id | sequential ID | int(10) unsigned | NO | PRI | NULL | auto_increment |
| iid | item.id | int(10) unsigned | NO | MUL | 0 | |