about sahring tables

about sahring tables

Hi all!
I'm new to ZOHO DB and i'm looking for a feature i'm not sure it exists. I need to create a database that is the sum of some others databases. For example:
first database called xxx with some columns as name, surname, address tha is accessible from a single user using a password. The "zzz" database with some columns as name, surname, address tha is accessible from a single user using a password.
When I access the other database called "YYY" i can find all the rows of the xxx and zzz database together.
Hope I have explained clear...
please help!
Gabriele