In this case, <literal>CASCADE</literal> means that the updated values of the

referenced column(s) should be copied into the referencing row(s).

There is also a noticeable difference between <literal>ON UPDATE NO

ACTION</literal> (the default) and <literal>NO UPDATE RESTRICT</literal>.

ACTION</literal> (the default) and <literal>ON UPDATE RESTRICT</literal>.

The former will allow the update to proceed and the foreign-key constraint

will be checked against the state after the update. The latter will

prevent the update to run even if the state after the update would still