Answers for "check if table exist and not empty in laravel"

laravel check if laravel query is empty

if ($result->first()) { } 
if (!$result->isEmpty()) { }
if ($result->count()) { }
if (count($result)) { }

how validate data if is exist must not be empty in laravel

$request->validate([
            'room_id'=>'sometimes|required',
            'doctor_id'=>'sometimes|required',
            'patient_id'=>'sometimes|required',
        ]);