Question

Any one help me for retrieving value from customn field in wp_post table
i ADDED a filed called rating in wp-post table .how retirve value from that
critical

Answer 1

using

get_post_meta

$meta_values = get_post_meta($post_id, $key, $single);

or

get_post_custom

 get_post_custom($post_id);

According to your comment:

Edit

$args = array( 'post_type' => 'your_post_type', 'posts_per_page' => 10 );
$loop = new WP_Query( $args );
while ( $loop->have_posts() ) : $loop->the_post();
    the_title();
    echo '<div class="entry-content">';
    the_content();
    echo '</div>';
endwhile;