Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.
In a workspace SQL Playground - Filtering By Comparing Values is small logic mistake:
In "Books Before 1900s" is code: SELECT * FROM books where first_published < 1900;
Its look ok, but above is question: -- What are all books released before the 20th century?
So if you wanna keep code the question should be looks like: "-- What are all books released before 1900?
But if you wanna keep the question valid, then code should be changed to: SELECT * FROM books where first_published <= 1900;
Because each century starts form "01" and and on "00" so 20 centry <1901-2000> and 19 centry <1801-1900>.