php & mysqli : สอบถามการใช้คำสั่งในการแสดงข้อมูล จากตาราง customer จัดกลุ่ม Country และ Province

-- Table structure for table `customer`
--

CREATE TABLE IF NOT EXISTS `customer` (
  `CustomerID` int(11) NOT NULL,
  `Name` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `Address` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `Area` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `Province` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `Code` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `Country` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `Email` varchar(100) COLLATE utf8_unicode_ci NOT NULL
) ENGINE=MyISAM AUTO_INCREMENT=12 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

--
-- Dumping data for table `customer`
--

INSERT INTO `customer` (`CustomerID`, `Name`, `Address`, `Area`, `Province`, `Code`, `Country`, `Email`) VALUES
(1, 'Win Weerachai', '16 AB building', 'Wattana', 'Bangkok', '10110', 'TH', '[email protected]'),
(2, 'Jame Born', '26 SS building', 'Hoy Yod', 'Cheing Mai', '89400', 'TH', '[email protected]'),
(3, 'Chalee Angel', '28', 'Ad Raod', 'New York', '90210', 'US', '[email protected]'),
(4, 'Angle Smith', '1', 'wilton close', 'Middlesex', 'UB1OWW', 'UK', '[email protected]'),
(5, 'Sombat Soi', '123', 'Mueng', 'Chieng Rai', '15468', 'TH', '[email protected]');
(6, 'Ann Joy', '88', 'Oxford close', 'London', 'LD190DD', 'UK', '[email protected]'),
(7, 'Jill Grass', '88', 'Oxford close', 'NY', 'LD190DD', 'US', '[email protected]'),
(8, 'Anna Box', '66', 'West Wood', 'ABC', '1234', 'USSR', '[email protected]'),
(9, 'John  Smith', '18 CC building', 'Bang Yai', 'Bangkok', '10400', 'TH', '[email protected]'),
(10, 'Somsir Soi', '123', 'Mueng', 'Chieng Rai', '15468', 'TH', '[email protected]'),
(11, 'Rob Box', '66', 'West Wood', 'ABC', '1234', 'USSR', '[email protected]'),


--
-- Indexes for dumped tables
--

--
-- Indexes for table `customer`
--
ALTER TABLE `customer`
  ADD PRIMARY KEY (`CustomerID`);

   $serverName = "localhost";
   $userName = "root";
   $userPassword = "";
   $dbName = "customer";

	$conn = mysqli_connect($serverName,$userName,$userPassword,$dbName);
	$conn->set_charset('utf8');

  	$sql="SELECT DISTINCT Country, Province FROM customer;";

	$query= mysqli_query($conn,$sql);
	while($result=mysqli_fetch_array($query,MYSQLI_ASSOC))
	{

	 //     $CustomerID=$result["CustomerID"];	   
		$Province=$result["Province"];
		$Country=$result["Country"];
	    echo "- ".$Country."<br>";
	    echo "+ ".$Province."<br>";
		echo "<br>";

 	}