ALTER TABLE rrna_method ADD FOREIGN KEY (id) REFERENCES rrna(id) ON DELETE CASCADE;
ALTER TABLE rrna_names ADD FOREIGN KEY (id) REFERENCES rrna(id) ON DELETE CASCADE;
ALTER TABLE rrna_product ADD FOREIGN KEY (id) REFERENCES rrna(id) ON DELETE CASCADE;
ALTER TABLE rrna_systematic_id ADD FOREIGN KEY (id) REFERENCES rrna(id) ON DELETE CASCADE;
ALTER TABLE rrna_temporary_systematic_id ADD FOREIGN KEY (id) REFERENCES rrna(id) ON DELETE CASCADE;
ALTER TABLE rrna_xrefs ADD FOREIGN KEY (id) REFERENCES rrna(id) ON DELETE CASCADE;
