Merging WP_QUERY objects in WordPress

Merge multiple WP_QUERY objects into one

//Your original 2 WP_Query results:

$query1 = new WP_Query($args_for_query1);
$query2 = new WP_Query($args_for_query2);

//Create a new WP_Query object to hold the joining of the 2 originals:

$joined_query = new WP_Query();
$joined_query->posts = array_merge( $query1->posts, $query2->posts );

//Update joined object's post count:

$joined_query->post_count = $query1->post_count + $query2->post_count;