Create a single class to encapsulate a single database table:
CREATE TABLE nomination (
id INTEGER PRIMARY KEY,
type VARCHAR(255),
year INTEGER,
film_id INTEGER,
credit_id INTEGER,
takes_the_oscar INTEGER
);
....
package Nomination;
use base 'Class::DBI';
Nomination->set_db('Main', 'dbi:pg', 'dbi_user', 'dbi_password');
Nomination->table('nomination');
Nomination->columns('id','type', 'year', 'film_id', 'credit_id', 'takes_the_oscar');
Nomination->columns(Primary => 'id');