How to access table from one database to another database

Hai all,

I have 2 databases namee PAO and CAS.

PAO contains 3 schemas named Public,pao,sts CAS contains 4 schemas

named Public,cao,sts,reports

Now i am in PAO database..now i want access table 'activity' in

schema 'cas' in CAS database.

How it is posible.

2nd thing is...

i have 2 servers access i.e local and mainserver.

How access table from one server to another server?

please tel me...because we need this one

Thanks & Regards

Vivekananda.R

Ph.9986463365

Information transmitted by this e-mail is proprietary to Infinite Computer Solutions and / or its Customers and is intended for use only by the individual or the entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If you are not the intended recipient or it appears that this mail has been forwarded to you without proper authority, you are notified that any use or dissemination of this information in any manner is strictly prohibited. In such cases, please notify us immediately at info(dot)in(at)infics(dot)com and delete this email from your records.