Funkcijai mysql_query() var padot arī otro argumentu, kas nosaka kuru konekciju lietot. Konekcijas linku atgriež mysql_connect() funkcija.
$conn1 = mysql_connect("localhost", "user1", "password1");
mysql_select_db("db1", $conn1);
$conn2 = mysql_connect("localhost", "user2", "password2");
mysql_select_db("db2", $conn2);
mysql_query($query1, $conn1);
mysql_query($query2, $conn2);
Vai arī, ja vienam lietotājam ir pieeja abām datubāzēm...
mysql_connect("localhost", "user", "password");
mysql_query("SELECT column FROM `db1`.`table`");
mysql_query("SELECT column FROM `db2`.`table`");