Laravel - how can I group data that has the same date or value

How can I group data that has the same date or value in laravel kindly help me thank you. im not sure why it is not combining into one.

here is my code and i am also getting an error

ERROR

Undefined property: Illuminate\Database\MySqlConnection::$date_today 

CONTROLLER

    $employeeSched = DB::table('schedules')
               ->select('date_today')
               ->where('date_today', true) //date_today is my data field name
               ->groupBy('date_today');   

VIEW

 @foreach ($employeeSched as $setTime)
              <tr>

                 <td> </td>

                 <td><input type="time" name="schedules[][timeIn]" class="form-control col-md-10" value=''></td>
                 <td><p>12:00 PM - 1:00 PM</p></td>
                    <td><input type="time" name="schedules[][timeOut]" class="form-control col-md-10" value=''></td>

                    <td>@php
                    $time1 = strtotime($setTime->time_in);
                    $time2 = strtotime($setTime->time_out);
                    $difference = round(abs($time2 - $time1) / 3600,2);
                    $total = $difference - 1;
                    echo '<b>' . $total . '</b>';
                 @endphp</td>


                <td>
                    @php
                    if ($total < 8) {
                        echo '<b>Under Time</b>';
                    } else if($total > 8) {
                        echo '<b>OT</b>';
                    } elseif ($total < 8.5 && $total == 8) {
                        echo '<b>In</b>';
                    }


                    @endphp
                </td>
              </tr>
              @endforeach

via Chebli Mohamed