How to use foreign keys in SQL Buddy?

I need to use foreign keys for update and cascade, etc.

ALTER TABLE topics
  ADD FOREIGN KEY(topic_by) REFERENCES users(user_id)
  ON DELETE RESTRICT开发者_StackOverflow中文版 ON UPDATE CASCADE;

but I am not able to make foreign keys in SQL Buddy.

Any way to do that?

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did you try this :

ALTER TABLE topics 
ADD CONSTRAINT topic_by FOREIGN KEY(user) 
REFERENCES users(user_id) ON DELETE RESTRICT ON UPDATE CASCADE

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Try this query:

ALTER TABLE topics
ADD CONSTRAINT topic_by
FOREIGN KEY (user_id) REFERENCES users(user_id);