ALTER TABLE trna_db_xref ADD FOREIGN KEY (id) REFERENCES trna(id) ON DELETE CASCADE;
ALTER TABLE trna_function ADD FOREIGN KEY (id) REFERENCES trna(id) ON DELETE CASCADE;
ALTER TABLE trna_locus_tag ADD FOREIGN KEY (id) REFERENCES trna(id) ON DELETE CASCADE;
ALTER TABLE trna_names ADD FOREIGN KEY (id) REFERENCES trna(id) ON DELETE CASCADE;
ALTER TABLE trna_note ADD FOREIGN KEY (id) REFERENCES trna(id) ON DELETE CASCADE;