-- ACTIVIDAD 1

-- 1
UPDATE Track
SET UnitPrice = 2.99
WHERE UnitPrice = 0.99;

-- 2
UPDATE Track
SET UnitPrice = 4.99
WHERE UnitPrice = 1.99;

-- 3
UPDATE Track
SET Composer = 'Sara'
WHERE TrackId = 2000;

-- 4
UPDATE Track
SET Composer = 'clasico'
WHERE Name LIKE 'Concerto%';
