How to get distinct values for non-key column fields in Laravel?

Question

This might be quite easy but have no idea how to.

I have a table that can have repeated values for a particular non-key column field. How do I write a SQL query usin

Answer 1

// Get unique value for table 'add_new_videos' column name 'project_id'
$project_id = DB::table('add_new_videos')->distinct()->get(['project_id']);

Answer 2

$users = User::all();
foreach($users->unique('column_name') as $user){
    code here..
}