Wordpress: How to fetch record from wp_posts and wp_postmeta in desc order by meta_value?

Question

I want to get record from wp_posts with multiple custom post and show in descending order by multiple meta value from wp_postmeta.meta_value.

Right now, I am using this query:

    $args = array(
        'numberposts' => -1,
        'post_type' => $field_keyn,
        'cat' => $fcat_list,
        'post_status' => 'publish',
        'relation' => 'OR',
    );
    // The Query
    // print_r($args ); 

    $my_query = new WP_Query($args);
    if ($my_query->have_posts()) {
        while ($my_query->have_posts()) :
            $my_query->the_post(); ?>

Answer 1

I think your argument array should be

$args = array ( 'numberposts' => -1,
                'post_type' => $field_keyn,
                'cat' => $fcat_list,
                'post_status' => 'publish',
                'orderby' => 'meta_value_num', 
                'meta_key' => 'metakeyname' );