Musíte použít jednoduchý JOIN
SELECT a.item_name, a.dish_id, b.sort
FROM item_names AS a
JOIN link_extras AS b
ON a.dish_id = b.dish_id
WHERE menu_id = 1
AND section_id = 2
GROUP BY b.dish_id
ORDER BY b.sort
Výstup:
| ITEM_NAME | DISH_ID | SORT |
------------------------------
| Fish | 24 | 0 |
| Chips | 27 | 1 |
| Pie | 23 | 2 |
| Onions | 26 | 3 |