Question

我不断收到消息说数据库查询失败::您的SQL语法出错了;检查与MySQL服务器版本对应的手册，以便在第1行的“WHERE id = 2”附近使用正确的语法，我似乎无法找到原因。我的用户插入方法工作正常，但无论出于何种原因，我无法通过此更新方法解决此错误：

public function update(){
  global $database;

  $sql  = "UPDATE users SET ";
  $sql .= "username='"   . $database->escape_value($this->username)   ."', "; 
  $sql .= "password='"   . $database->escape_value($this->password)   ."', "; 
  $sql .= "first_name='" . $database->escape_value($this->first_name) ."', "; 
  $sql .= "last_name='"  . $database->escape_value($this->last_name)  ."', "; 
  $sql .= "WHERE id="    . $database->escape_value($this->id); 
  $database->query($sql);
  if($database->affected_rows() == 1){
     $message = "success";

  }else{
     $message = "no " . mysql_error();
  }
  return $message;
}

Answer 1

WHERE子句之前的最后一个逗号是错误，更改：

$sql .= "last_name='"  . $database->escape_value($this->last_name)  ."', ";

到

$sql .= "last_name='"  . $database->escape_value($this->last_name)  ."' ";

数据库查询失败

1 个答案: