WP_Query – display posts by custom field and order by another

Question

$q = new WP_Query( array(
    'meta_query' => array(
        'relation' => 'AND',
        'state_clause' => array(
            'key' => 'state',
            'value' => 'Wisconsin',
        ),
        'city_clause' => array(
            'key' => 'city',
            'compare' => 'EXISTS',
        ), 
    ),
    'orderby' => array( 
        'city_clause' => 'ASC',
        'state_clause' => 'DESC',
    ),
) );

You can use this query for ordering, even with more than one meta keys. These are called sub queries.

Please check this link from codex –
https://developer.wordpress.org/reference/classes/wp_meta_query/