我找不到如何從MYSQL 把3個option load出來的方法，只能在view上hardcode印出來，現在的方法是做到我要的效果，但如果我的option是幾十個，就會很長，請問有解決方法嗎?

mysql setting

create

  <div class="form-group col-md-6">
     <label for="action_unit">Action Unit</label>
        <select class="form-control select2" id="action_unit" name="action_unit">
                <option>--</option>
                <option value="degree">degree</option>
                <option value="times">times</option>
                <option value="percentage">percentage</option>
         </select>
   </div>

load

<div class="form-group col-md-6">
    <label for="action_unit">Action Unit</label>
       <select class="form-control select2" id="action_unit" name="action_unit">
       
 <option <?php if ($action_data['ACTION_UNIT'] == 'degree') {
           echo 'selected'; } ?> value=<?php echo $action_data['ACTION_UNIT'] ?>>degree</option>

 <option <?php if ($action_data['ACTION_UNIT'] == 'times') {
           echo 'selected';} ?> value=<?php echo $action_data['ACTION_UNIT'] ?>>times</option>

  <option <?php if ($action_data['ACTION_UNIT'] == 'percentage') {
           echo 'selected';} ?> value=<?php echo $action_data['ACTION_UNIT'] ?>>percentage</option>
        </select>
 )</div>