ALTER TABLE IF EXISTS vn.sectorCollectionSaleGroup DROP FOREIGN KEY sectorCollectionSaleGroup_ibfk_3; ALTER TABLE IF EXISTS vn.sectorCollectionSaleGroup DROP FOREIGN KEY sectorCollectionSaleGroup_ibfk_2; ALTER TABLE IF EXISTS vn.sectorCollectionSaleGroup DROP KEY saleGroupFk; ALTER TABLE IF EXISTS vn.sectorCollectionSaleGroup ADD CONSTRAINT sectorCollectionSaleGroup_saleGroup_FK FOREIGN KEY (saleGroupFk) REFERENCES vn.saleGroup(id) ON DELETE CASCADE ON UPDATE CASCADE; ALTER TABLE IF EXISTS vn.sectorCollectionSaleGroup ADD CONSTRAINT sectorCollectionSaleGroup_unique UNIQUE KEY (sectorCollectionFk,saleGroupFk);