SQL/PHP-语法错误或访问冲突：1064您的SQL语法有错误；

我有一个数据库，我正试图更新其中的一行，但我一直收到这个错误。在以前的一个程序中，我使用了相同的函数，所以我看不出哪里出了问题，这让我发疯！如果有人能看到任何东西或帮助我，将不胜感激

以下是更新功能：

public function update($member){
   if ($member == null){
      throw new Exception("Member ID Required");   }  

    $id = $member->getId();
    if ($id == null){
        throw new Exception("Member ID Required");
    }
    $sql = "UPDATE member SET
        firstName = :firstName,
        lastName = :lastName,
        dob = :dob,
        email = :email,
        gender = :gender,
        skillLevel = :skillLevel,
        Where id = :id";

    $params = array(
        'id' => $member->getId(),
        'firstName' => $member->getFirstName(),
        'lastName' => $member->getLastName(),
        'dob' => $member->getDOB(),
        'email' => $member->getEmail(),
        'gender' => $member->getGender(),
        'skillLevel' => $member->getSkillLevel(),
    );
      $stmt = $this->link->prepare($sql);
    $status = $stmt->execute($params);
    if ($status != true){
        $errorInfo = $stmt->errorInfo();
        throw new Exception("Could Not Add Member: " . $errorInfo[2]);
    }
    return $stmt->rowCount();
    }

这是它从中获取数据的编辑页面

<?php

require_once('member.php');
require_once('MemberDAO.php');
require_once('editFormValidator.php');

$validator = new editFormValidator();

if ($validator->validate($_POST)){
$i = $_POST['memberID'];
$firstName = $_POST['firstName'];
$lastName = $_POST['lastName'];
$dob = $_POST['dob'];
$email = $_POST['email'];
$gender = $_POST['gender'];
$skillLevel = $_POST['skillLevel'];
$skillLevelString = implode(", ", $skillLevel);
$member = new Member ($i,$firstName, $lastName, $dob, $email, $gender,     $skillLevelString);
$dao = new MemberDAO();
$dao->update($member);
header ('Location: viewMember.php');
}
else{
require_once 'editMember.php';
}
?>

---

这里有一个多余的逗号：

skillLevel = :skillLevel,

skillLevel = :skillLevel,