Select Code to Download

SELECT column_name FROM table_name
WHERE column_name IN (value1,value2,..)

my $p_str = join ',', ('?') x @array;

SELECT column_name FROM table_name
WHERE column_name IN ($p_str)# here it's printing question marks, why?
+ Is this correct? Shoul the values here be the valuye from @array and
+ not a bunch of question marks?