MySQL - row number in recordset?

Question

First of all, I\'m not asking how to get the current row number after the results have been return to you.

I\'m wondering, is it possible to get the row number as on

Answer 1

select table.*,@rn:=@rn+1 as row_num
from table,(select @rn:=0) as r order by field_you_like

Answer 2

select @n := @n + 1 mynum, t.*
from (select @n:=0) initvars, tbl t