[web2py] select * from table_name where id IN (1,2,3,4,5,6) Using DAL ?

[KMax]

Hello,
 Is any way to query subj with DAL sintax?
 I am using two databases, and I want select from second one few rows 
according to result of select from first database.

 I think this will not work.
db1(db1.tablename.id==db2.tablename.id).select()

Thanks in advance
--
Maxim