-- Place your SQL code here
ALTER TABLE vn.clientContact 
    ADD CONSTRAINT clientContact_FK FOREIGN KEY (clientFk) REFERENCES vn.client(id) 
    ON DELETE CASCADE ON UPDATE CASCADE;

ALTER TABLE vn.clientSample MODIFY COLUMN clientFk int(11) NOT NULL;

ALTER TABLE vn.clientSample 
    ADD CONSTRAINT clientSample_FK FOREIGN KEY (clientFk) REFERENCES vn.client(id) 
    ON DELETE CASCADE ON UPDATE CASCADE;

ALTER TABLE vn.greuge MODIFY COLUMN clientFk int(11) NOT NULL;

ALTER TABLE vn.greuge 
    ADD CONSTRAINT greuge_FK_1 FOREIGN KEY (clientFk) REFERENCES vn.client(id) 
    ON DELETE CASCADE ON UPDATE CASCADE;

ALTER TABLE vn.supplierAddress MODIFY COLUMN supplierFk int(10) UNSIGNED DEFAULT NULL NULL;
-- poner unsigned

ALTER TABLE vn.supplierAddress 
    ADD CONSTRAINT supplierAddress_FK FOREIGN KEY (supplierFk) REFERENCES vn.supplier(id) 
    ON DELETE CASCADE ON UPDATE CASCADE;