question about performance

Hi PostgreSQLer,

if I have a table, the_table, with a DATE field, i'll call it 'day', and I'd
like to find all rows whos day falls within a given month, which of the
following methods is faster/costs less:

1.

    SELECT * FROM the_table WHERE day LIKE '2008-01-%';

2.

    SELECT * FROM the_table
        WHERE ( day BETWEEN '$month_begin' AND '$month_end' );

    # where $month_begin is '2008-01-01' and $month_end is '2008-01-31';

thanks,

Rob Urban