booktown=# SELECT books_by_subject('al1');
books_by_subject
Arts:
Dynamic Anatomy
Business:
Children's Books:
The Cat in the Hat
Bartholomew and the Oobleck
Franklin in the Dark
Goodnight Moon
[...]
Science:
Science Fiction:
Dune
2001: A Space Odyssey
(1 row)
booktown=# SELECT books_by_subject('Computers');
books by_subject
Computers:
Learning Python
Perl Cookbook
Practical PostgreSQL
Programming Python
(1 row)