you can use mysql_db_query to connect diff db tables,
...............
mysql_connect($ hostname, $user, $passwd);
$result = mysql_db_query( $db1, $query1);
$row1 = mysql_fetch_obj ect($result);
$result = mysql_db_query( $db2, $query2);
$row2 = mysql_fetch_obj ect($result);
............
...............
mysql_connect($ hostname, $user, $passwd);
$result = mysql_db_query( $db1, $query1);
$row1 = mysql_fetch_obj ect($result);
$result = mysql_db_query( $db2, $query2);
$row2 = mysql_fetch_obj ect($result);
............
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