Guests at the End
Operators need a list of all orders: orders with higher user_id first, while guest orders without user_id must appear at the very end. For the same user_id, sort by ascending id. Return id and user_id.
Eksempel på forventet output
Sådan ser et korrekt svar ud — dets rækketal er dets eget og behøver ikke at matche skematabellerne.
| id | user_id |
|---|---|
| 14 | 4 |
| 13 | 3 |
| 12 | 2 |
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