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

Development Tools Database Foundations Joining Relational Data Between Tables in SQL Keys and Auto-Incrementing Values

Posted by William J. Terrell
William J. Terrell
17,403 Points

Database Foundations - Keys and Auto-Incrementing Values - Code Challenge Part I - [SOLVED]

The question asks to:

"Create a genres table called "t_genres" with an auto incrementing primary key called "pk_id" and a unique column called "uk_name" that can't be null. The "uk_name" is a varchar of up to 45 characters."

and when I enter the code below, I get an error saying:

"Bummer! You're missing the PRIMARY KEY of 'pk_id'."

My code is as follows:

CREATE TABLE t_genres (pk_id INTEGER NOT NULL AUTO INCREMENT PRIMARY KEY, uk_name VARCHAR(45) NOT NULL UNIQUE KEY);

I cannot figure out what is wrong. Any assistance would be greatly appreciated. :)

Thanks!

[SOLVED]

Ugh! I found out what was wrong! There is an underscore between "AUTO" and "INCREMENT":

CREATE TABLE t_genres (pk_id INTEGER AUTO_INCREMENT PRIMARY KEY, uk_name VARCHAR(45) NOT NULL UNIQUE KEY);

Thanks just the same! :)

1 Answer

Rick Gessner
Rick Gessner
43 Points
Rick Gessner
Rick Gessner
43 Points

CREATE TABLE t_genres ( pk_id int(11) DEFAULT NULL, uk_name varchar(45) NOT NULL UNIQUE KEY )

William J. Terrell
William J. Terrell
17,403 Points

Thanks, but that doesn't seem to work, and I don't see where it defines pk_id as an auto-incrementing primary key in that code either.