ติด Error คำสั่ง SQL No database selected ช่วยดูให้ทีนะค่ะกำลังฝึกหัดค่ะ

<?php
include_once('config.php');

function do_edit(){
			$pass = $_POST['pass'];
			$key = $_POST['key'];
			$user = $_POST['user'];
			$time = $_POST['time'];
			$tag = $_POST['tag'];
			$url = $_POST['url'];
			$id = $_POST['id'];
			$st = $_POST['status'];
			$cate = $_POST['cate'];
			
			
mysql_connect ($_CONFIG['mysql']['host'], $_CONFIG['mysql']['username'], $_CONFIG['mysql']['password']) or die("Could not connect: " . mysql_error());
mysql_select_db($_CONFIG['mysql']['account_db_name']) or die("Could not : " . mysql_error());
$sql = "UPDATE `shop` SET `user`='$user', `pass`='$pass', `key` = '$key', `time` = '$time', `tag` = '$tag', `url` = '$url', `status` = '$st', `cate` = '$cate' WHERE id = '$id'";
$result = mysql_query($sql);
if($sql)
{
echo "<font color='green'>Save Edit.</font>";
}
else
{
echo "<font color='red'>Edit Fail.</font>";
}
}
?>