This is the only help they offer:
If you have not assigned a user name and password to your database, you must do so before you can access your database. Your Yahoo! ID and password will not automatically work.
Once a user name and password are created, you can access your database through any PHP script running on your account. Users with intensive database needs may choose to install phpMySQL, a powerful database administration tool. However, you can create any custom PHP scripts to access your database. Below are a few lines of PHP code that show you how to access your database:
<?php
$link = mysql_connect("mysql", "USERNAME", "PASSWORD");
mysql_select_db("DATABASE");
$query = "SELECT * FROM TABLE";
$result = mysql_query($query);
while ($line = mysql_fetch_array($result))
{
foreach ($line as $value)
{
print "$value\n";
}
}
mysql_close($link);
?>
Of course, you must replace USERNAME and PASSWORD with the user name and password that you have created for your database. You must also replace TABLE and DATABASE with the valid table and database names from your database. The address of the MySQL database server is just "mysql" -- a port number is not necessary.