Add Column With A Custom Field To Wordpress Admin Post Listing

Custom Meta Value Column

///////////////////////////////////////////////////////////
//Custom Backend Column from Custom Field. Be sure to edit post-type- "manage_edit-POSTTYPE_columns"- and Custom Field Name.
///////////////////////////////////////////////////////////
add_filter('manage_edit-staff_columns', 'my_columns');
function my_columns($columns) {
  unset($columns['author']);
	unset($columns['date']);
    $columns['Name'] = 'Name';
    $columns['author'] = 'Author';
    $columns['date'] = 'Date';
    return $columns;
}
add_action('manage_posts_custom_column',  'my_show_columns');
function my_show_columns($name) {
    global $post;
    switch ($name) {
        case 'Name':
            $views = get_post_meta($post->ID, 'Name', true);
            echo $views;
    }
}