By default, WordPress allows you to sort results of a query by one meta value, but what if you need to sort results by two meta values (For example date and time)? Here ‘s a working example.

Paste the code below in your template file where you need to sort the results of the query.

 <?php   $query = "SELECT wposts.*, wpostmeta1.*, wpostmeta2.*  FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta1, $wpdb->postmeta wpostmeta2 WHERE wposts.ID = wpostmeta1.post_id AND wposts.ID = wpostmeta2.post_id AND wpostmeta1.meta_key = 'date' AND wpostmeta2.meta_key = 'time' ORDER BY wpostmeta1.meta_value ASC,          wpostmeta2.meta_value ASC";  $results = $wpdb->get_results($query);  foreach ( $results as $result ) {          //output results as desired } ?> 

Please note that this query is given as an example and might need to be adapted to fit your specific needs. If you need help at a cheap rate, contact WPCAT.