select all columns which are not in another table laravel 5.5

Question

I have two tables - the first one is called \'users\' and the second one is called \'buy_courses\'.

I am trying to select all users those user_name

Answer 1

Try it using Eloquent:

$courseUserNames = BuyCourses::pluck('user_name')->all();
$users = User::whereNotIn('user_name', $courseUserNames)->select(...)->get();

Or if you prefer using DB query:

$courseUserNames = DB::table('buy_courses')->pluck('user_name')->all();
$users = DB::table('users')->whereNotIn('user_name', $courseUserNames)->select(...)->get();