Question

Which of the following statements is a valid DROP VIEW statement to remove the two views, displaying an error if either view doesn't exist?

a) DROP VIEW album_cost, album_artist_names;
b) DROP VIEW album_cost, album_artist_names CASCADE;
c) DROP VIEW IF EXISTS album_cost, album_artist_names;
d) DROP VIEW album_cost AND album_artist_names;

Answer 1

The valid DROP VIEW statement to remove two views and display an error if either view doesn't exist is a) DROP VIEW album_cost, album_artist_names.

Step-by-step explanation:

The correct statement to remove two views, showing an error if either view doesn't exist, is option a) DROP VIEW album_cost, album_artist_names. The DROP VIEW statement will attempt to remove both specified views from the database. If either of the views does not exist, the statement will fail and produce an error. This behavior matches the requirement to display an error if either view doesn't exist.

Option b) is incorrect because appending CASCADE would not necessarily show an error if a view doesn't exist; it might also drop objects dependent on the views. Option c), DROP VIEW IF EXISTS, will not throw an error if a view doesn't exist, which does not meet the criteria. Option d) is syntactically incorrect as the correct syntax for dropping multiple views does not include the word AND.