Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Databases

Colby Wise
Colby Wise
3,165 Points
Posted by Colby Wise
Colby Wise
3,165 Points

Challenge Q2: Why doesn't this work?

ALTER TABLE t_movies ADD COLUMN pk_id INTEGER AUTO_INCREMENT PRIMARY KEY FIRST);

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

:point_right: It looks like you just have a typo.

There's a stray closing parenthesis at the end of the query.

Colby Wise
Colby Wise
3,165 Points
Colby Wise
Colby Wise
3,165 Points

Thanks Steven. Also I feel like i'm close on this one but can't quite figure it out:

Alter the "t_movies" table to add a foreign key column called "fk_genre_id" and constrain it to reference the "t_genres" "pk_id".

Q: What does it mean by reference the "t_genres" "pk_id".

ALTER TABLE t_movies 
ADD COLUMN fk_genre_id INTEGER, 
ADD CONSTRAINT FOREIGN KEY (t_genres)
REFERENCES t_genres(pk_id);