Did you try:
$routes = DB::table('route')
->groupBy('rte_origin', 'rte_destination')
->get();
Can’t test here right now, but the API says groupBy() accepts an array.
For reference, please visit:
- Laravel 5.0: https://github.com/laravel/framework/blob/5.0/src/Illuminate/Database/Query/Builder.php#L1037
- Laravel 4.2: https://github.com/laravel/framework/blob/4.2/src/Illuminate/Database/Query/Builder.php#L1017