Código PHP:
$db = 'playname';
$dbme = 'accountinfo';
//Database Connection
$msconnect=mssql_connect("127.0.0.1","sa","xxxxxx");
$msdb=mssql_select_db("$db",$msconnect);
Código PHP:
// esto esta en la db accountinfo
$sql_username_check = mssql_query(SELECT id FROM INFO WHERE id=$login and pwd=$oldpwd);
$username_check = mssql_num_rows($sql_username_check);
//esto esta en la db playname
$sql_name_check = mssql_query("SELECT Name FROM Character WHERE Name='$name'");
$name_check = mssql_num_rows($sql_name_check);
elseif ($username_check <= 0){
echo "Este id no existe"; exit();}
elseif ($name_check <= 0){
echo "Este Nombre no existe"; exit();}
espero su ayuda gracias