ALTER TABLE customer ADD FOREIGN KEY (payment_id) REFERENCES payment_terms (id);
ALTER TABLE customer ADD FOREIGN KEY (language_id) REFERENCES language (id);
ALTER TABLE customer ADD FOREIGN KEY (business_id) REFERENCES business (id);
ALTER TABLE customer ADD FOREIGN KEY (payment_id) REFERENCES payment_terms (id);
ALTER TABLE customer ADD FOREIGN KEY (language_id) REFERENCES language (id);
ALTER TABLE customer ADD FOREIGN KEY (business_id) REFERENCES business (id);