join between two tables in two different databases

DB_CONNECTIONSTRING_COM="driver={MySQL ODBC 3.51 driver};server=ip;port=p;uid=id;pwd=pw;database=db1;option=;Provider=MSDASQL;"
Set conn1= Server.CreateObject("ADODB.Connection")
conn1.Open DB_CONNECTIONSTRING_COM

DB_CONNECTIONSTRING_COM2="driver={MySQL ODBC 3.51 driver};server=ip;port=p;uid=id;pwd=pw;database=db2option=;Provider=MSDASQL;"
Set conn2= Server.CreateObject("ADODB.Connection")
conn2.Open DB_CONNECTIONSTRING_COM2

I have two objects that connect to two databases .
How do I make a join between two tables in the two databases?

thanks