Group By value RAND()

Question

It\'s possible get a random value of the group by?

----------------
 nID |  val
---------------
  A  |   XXX
  A  |   YYY
  B  |   L
  B  |   M
  B  |   N
           


        

Answer 1

You can use order by rand() then group by them.

Like

  SELECT nID, VAL FROM (
  SELECT nID, VAL
  FROM T1
  ORDER BY RAND()
  )AS subquery
GROUP BY nID