Cascade, no action, Restrict, set null, cascaderestrict in MySQL foreign key settings

Cascade, no action, Restrict, set null, cascaderestrict in MySQL foreign key settings
Attribute meanings in MySQL foreign key settings:
Cascade Mode
When updating/deleting records in the parent table, synchronize update/delete matching records in the child table

Set null
When updating/deleting records in the parent table, set the columns of matched records in the child table to null.
Note that the foreign key column of the sub-table cannot be not null.

No action Method
If the child table has matched records, the update/delete operation on the candidate keys corresponding to the parent table is not allowed.

Restrict Mode
The same as no action, both check foreign key constraints immediately

Set default Mode
When the parent table is changed, the child table sets the foreign key column to a default value, but Innodb cannot recognize it.