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

Posted by Pierce Mulligan
Pierce Mulligan
1,106 Points

What is the issue with my PRIMARY KEY?

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.

I keep getting an error stating that I'm not creating a PRIMARY KEY, but it is clearly defined. Where am I going wrong?

my code:

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

1 Answer

Stuart Ringold
Stuart Ringold
12,508 Points
Stuart Ringold
Stuart Ringold
12,508 Points

A primary key must be NOT NULL.

Also AUTO_INCREMENTING should be AUTO_INCREMENT.

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

Stuart Ringold
Stuart Ringold
12,508 Points
Stuart Ringold
Stuart Ringold
12,508 Points

generally speaking there won't be any [*ing] in queries.