>>> # Individual tables can be accessed with their name only if it is unique:
>>> external_table = external_tables["my_table"]
>>> # Or with a tuple with the schema name to differentiate the tables:
>>> external_table = external_tables["my_schema", "my_table"]
>>> # Or even a tuple starting with the catalog name:
>>> external_table = external_tables["my_catalog", "my_schema", "my_table"]