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

SELECT 
  t1.nID, 
  (SELECT 
     t2.var 
   FROM your_table t2 
   WHERE t1.nID = t2.nID ORDER BY rand() LIMIT 1
  ) AS var 
FROM your_table t1 
GROUP BY t1.nID ;