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

Posted by Rishi Shah
Rishi Shah
5,298 Points

Having trouble adding a constraint

ALTER TABLE movies add column genre_id INTEGER NULL ADD CONSTRAINT FOREIGN KEY (genre_id)REFERENCES genre(id);

This does not work. I get a response "Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ADD CONSTRAINT FOREIGN KEY (genre_id)REFERENCES genre(id)' at line 1"

1 Answer

ilya martynenko
PLUS
ilya martynenko
Courses Plus Student 3,698 Points
ilya martynenko
ilya martynenko
Courses Plus Student 3,698 Points

Add comma before adding a constraint. Right syntax will be: 

ALTER TABLE movies  ADD COLUMN genre_id integer NULL, ADD CONSTRAINT FOREIGN KEY (genre_id) references genres(id)