How to change the foreign key referential action? (behavior)

Question

I have set up a table that contains a column with a foreign key, set to ON DELETE CASCADE (delete child when parent is deleted)

What would the SQL com

Answer 1

ALTER TABLE DROP FOREIGN KEY fk_name;
ALTER TABLE ADD FOREIGN KEY fk_name(fk_cols)
            REFERENCES tbl_name(pk_names) ON DELETE RESTRICT;