Well done! And what happens if we try to modify a table that has dependent views? If the modification doesn't affect the views, we'll be able to perform the operation. For instance, we have the following table and view:

CREATE TABLE gym (
  id integer PRIMARY KEY,
  name varchar(32),
  city varchar(32),
  monthly_fee decimal(5, 2),
  max_capacity integer
);

CREATE VIEW big_gyms_london AS
SELECT id, name, max_capacity
FROM gym
WHERE city = 'London'
  AND max_capacity > 50;

We want to get rid of the monthly_fee column, so we can write:

ALTER TABLE gym
DROP COLUMN monthly_fee;

Because the view doesn't use monthly_fee, we're able to delete the column just fine.