The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/12/tutorial-fk.html
Description:
Hello
Thank you for your great tutorial.
I wasn't able to compile the below without a 'not null' after the primary
key word:
https://www.postgresql.org/docs/current/tutorial-fk.html
Just flagging in case it needs to be updated.
Thanks,
Ashok