-- Place your SQL code here

USE vn;

ALTER TABLE vn.collectionColors ADD rgb char(7) DEFAULT NULL NULL;

ALTER TABLE vn.collectionColors ADD CONSTRAINT collectionColors_UN UNIQUE KEY (shelve,wagon,trainFk);

UPDATE vn.collectionColors
SET rgb='#ff0000'
WHERE id=1;

UPDATE vn.collectionColors
SET rgb='#ffce30'
    WHERE id=2;

UPDATE vn.collectionColors
SET rgb='#008000'
    WHERE id=3;

UPDATE vn.collectionColors
SET rgb='#0000ff'
    WHERE id=4;

UPDATE vn.collectionColors
SET rgb='#ffffff'
    WHERE id=5;

UPDATE vn.collectionColors
SET rgb='#000000'
    WHERE id=6;