ALTER TABLE genbank.feature_gene_id ADD FOREIGN KEY (id) REFERENCES genbank.feature(id) ON DELETE CASCADE;
ALTER TABLE genbank.feature_names ADD FOREIGN KEY (id) REFERENCES genbank.feature(id) ON DELETE CASCADE;
ALTER TABLE genbank.feature_db_xref ADD FOREIGN KEY (id) REFERENCES genbank.feature(id) ON DELETE CASCADE;
ALTER TABLE genbank.feature_introns ADD FOREIGN KEY (id) REFERENCES genbank.feature(id) ON DELETE CASCADE;
ALTER TABLE genbank.feature_exons ADD FOREIGN KEY (id) REFERENCES genbank.feature(id) ON DELETE CASCADE;
ALTER TABLE genbank.feature_ec_number ADD FOREIGN KEY (id) REFERENCES genbank.feature(id) ON DELETE CASCADE;
