ALTER TABLE genbank.gene_exons ADD FOREIGN KEY (id) REFERENCES genbank.gene(id) ON DELETE CASCADE;
ALTER TABLE genbank.gene_introns ADD FOREIGN KEY (id) REFERENCES genbank.gene(id) ON DELETE CASCADE;
ALTER TABLE genbank.gene_names ADD FOREIGN KEY (id) REFERENCES genbank.gene(id) ON DELETE CASCADE;
ALTER TABLE genbank.gene_note ADD FOREIGN KEY (id) REFERENCES genbank.gene(id) ON DELETE CASCADE;
