Final answer:
To retrieve playlist names and track names in descending order from the 'playlist_track_names' view, use the SQL 'ORDER BY' clause, sorting first by playlist_name then by track_name both in descending order.
Step-by-step explanation:
To query playlist names and track names in descending order from the playlist_track_names view that has been created, you can use the SQL ORDER BY clause. Here is how you can write the query:
SELECT playlist_name, track_name FROM playlist_track_names ORDER BY playlist_name DESC, track_name DESC;
This SQL statement will return the results sorted by playlist_name in descending order first, and then by track_name in descending order within each playlist grouping, ensuring that the names are sorted from Z to A. This is a common pattern when dealing with sorting in SQL, allowing for a clear hierarchical organization of the ordered data.