laravel query builder before updating code example

Example 1: laravel chunk select

DB::table('users')->chunk(100, function($users)
{
    foreach ($users as $user)
    {
        //
    }
});

Example 2: laravel find query

return Destination::orderByDesc(
    Flight::select('arrived_at')
        ->whereColumn('destination_id', 'destinations.id')
        ->orderBy('arrived_at', 'desc')
        ->limit(1)
)->get();