ALTER TABLE genbank.mrna_db_xref ADD FOREIGN KEY (id) REFERENCES genbank.mrna(id) ON DELETE CASCADE;
ALTER TABLE genbank.mrna_exons ADD FOREIGN KEY (id) REFERENCES genbank.mrna(id) ON DELETE CASCADE;
ALTER TABLE genbank.mrna_introns ADD FOREIGN KEY (id) REFERENCES genbank.mrna(id) ON DELETE CASCADE;
ALTER TABLE genbank.mrna_names ADD FOREIGN KEY (id) REFERENCES genbank.mrna(id) ON DELETE CASCADE;
ALTER TABLE genbank.mrna_note ADD FOREIGN KEY (id) REFERENCES genbank.mrna(id) ON DELETE CASCADE;
