I have a table like this:
我有一张这样的桌子:
+----+-----------+------+-------+--+
| id | Part | Seq | Model | |
+----+-----------+------+-------+--+
| 1 | Head | 0 | 3 | |
| 2 | Neck | 1 | 3 | |
| 3 | Shoulders | 2 | 29 | |
| 4 | Shoulders | 2 | 3 | |
| 5 | Stomach | 5 | 3 | |
+----+-----------+------+-------+--+
+----+
