How do I edit a unique column reference as foreign key in another table in mysql?

Question

I have one master table having column keywords varchar(120) as Unique and it is reference to another table **cmp_keywords** as a foreign key. Now how can I edit the column keywords value from master table and cmp_keywords table?

Answer 1

Define your foreign key with the option ON UPDATE CASCADE . Then just update the master table (correct term is parent table), then your child table will be updated automatically.

From the top of my head

ALTER TABLE cmp_keywords DROP FOREIGN KEY <foreign_key_name>, 
ADD FOREIGN KEY my_new_fk_name (cmp_keywords_column) ON UPDATE CASCADE REFERENCES master_table(keywords);

should do it. If not, figure out the correct syntax with this link .