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PHP

Jannik Spiessens
Jannik Spiessens
13,229 Points
Posted by Jannik Spiessens
Jannik Spiessens
13,229 Points

Adding foreign key code challenge

The challenge says:

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

I did:

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

The error says:

Bummer! You're missing the 'fk_genre_id' column.

I can't figure out the problem. Is this a bug or am I missing something?

3 Answers

Becky Hirsch
Becky Hirsch
14,069 Points

If you add a comma between NULL and ADD it should work.

ALTER TABLE t_movies ADD COLUMN fk_genre_id INTEGER NULL, ADD CONSTRAINT FOREIGN KEY (fk_genre_id) REFERENCES t_genres(pk_id);
Jannik Spiessens
Jannik Spiessens
13,229 Points
Jannik Spiessens
Jannik Spiessens
13,229 Points

That worked! Thanks for helping me out.

Becky Hirsch
Becky Hirsch
14,069 Points
Becky Hirsch
Becky Hirsch
14,069 Points

My pleasure! I remember missing the comma in that challenge :).