How to select DISTINCT rows without having the ORDER BY field selected

Question

So I have two tables students (PK sID) and mentors (PK pID). This query

SELECT s.pID
FROM students s JOIN mentors m ON s.pID = m.pID
WHERE m.tags LIKE \'%a%\         


        

Answer 1

SELECT s.pID
FROM students s JOIN mentors m ON s.pID = m.pID   
WHERE m.tags LIKE '%a%'
GROUP BY s.pID
ORDER BY MAX(s.sID) DESC