How to access a second database

[Sherman Willden <operasopranos@xxxxxxxxx>]

I am trying to access a table from another database. I have the permissions to create under my own login. I have performed the following so far:

sherman@sql-dev: createdb sandbox01

sherman@sql-dev:~$ createdb sandbox02.

After logging into sandbox02 I performed the following: sandbox02=# CREATE TABLE last_names(last_name TEXT);

sandbox02=# INSERT INTO last_names VALUES(willden);

Now I think I want to use a foreign key in sandbox01. Is the following how it works after logging into sandbox01?

sandbox01=# CREATE TABLE first_and_last(first_name TEXT, last_name FOREIGN KEY last_name REFERENCES sandbox02(last_names(last_name))

and then sandbox01=# INSERT INTO first_and_last(sherman, willden);

Thank you;

Sherman