มี Error mysqli_query() expects at least 2 parameters, 1 given แก้ตรงไหนครับ

<?php
require_once 'connect.php';

//ini_set('display_eror',1);

if (isset($_GET['id'])) {

	$sql = "SELECT name_image FROM test WHERE id =".$_GET['id']." ";
	$query = mysqli_query($conn,$sql) or die ('Error Query');
	$data = mysqli_fetch_assoc($query);
	$path = __DIR__.DIRECTORY_SEPARATOR.'logo_img'.DIRECTORY_SEPARATOR.$data['name_image'];
	if (file_exists($path) && !empty($data['name_image'])) {
		@unlink($path);
}
	mysqli_query("Delete FROM test WHERE id =".$_GET['id']."" ); <<<<<< Error บรรทัดนี้ครับ
}

$sql = "SELECT * FROM test 
Where member_id='admin'";

$query = mysqli_query($conn,$sql) or die ("Error Query");

?>