Create extension

CREATE EXTENSION postgres_fdw;

Create server

CREATE SERVER server_name FOREIGN DATA WRAPPER postgres_fdw options(host 'host_addr', port '5432', dbname 'db_name');

Create user mapping

CREATE USER MAPPING FOR postgres SERVER server_name options(user 'username',password 'password');

Import remote schema

IMPORT FOREIGN SCHEMA schema_name LIMIT TO (table1,table2,...) FROM SERVER server_name INTO destination_schema;

\dx list the installed extensions
\des List the foreign servers
\deu+ List the user mappings

Drop

DROP FOREIGN TABLE table_name;
DROP USER MAPPING FOR user_name SERVER server_name;
DROP SERVER server_name;