How to automatically set null for elements associated with id?

Question

MariaDB

Given table 1.
id_tabl1(pk), name
Given table 2.
id_tabl2(pk), name, tabl1 (fk: tabl1 on id_tabl1) Cascading

update by fk.

table1 has the possibility of null values.

I can’t remember and find how to put null in an entry in table 2 if the entry from table 1 to which it referred was deleted.

Answer 1

foreign key ... on delete set null