sharing data between 2 db's without changing either design

[action]

I have 2 databases, I want to share customer data between but both have 3rd party applications running over the top.

DB1, I can make full changes to the tables etc but DB2 is locked down and can't open but I can write to it via SQL or link the tables.

Any ideas how I can share this data with out changing either database design?

Thanks

 

[namliam]

Just run Update/append queries ...

Regards