使用laravel的Eloquent模型如何获取数据库的指定列

$users = DB::table('users')->select('name', 'email as user_email')->get();

$users = User::select(['name'])->get();
$users = User::select('name')->get();

$users = User::all(['name']);
$admin_users = User::where('role', 'admin')->get(['id', 'name']);
$user = User::find($user_id, ['name']);
$user = User::where('role', 'admin')->first(['name']);

$posts = User::find($user_id)->posts()->select(['title'])->get();
$posts = User::find($user_id)->posts()->get(['title', 'description']);