_sku test
$meta_query = array( 'relation' => 'AND', array( 'key' => '_sku', 'value' => '899 %', 'compare' => 'LIKE', ), array( 'key' => '_stock_status', 'value' => 'instock', 'compare' => '=', ), );
$meta_query = array( 'relation' => 'AND', array( 'key' => '_sku', 'value' => '899 %', 'compare' => 'LIKE', ), array( 'key' => '_stock_status', 'value' => 'instock', 'compare' => '=', ), );