Re: How do I alter an existing column and add a foreign key which is a Primary key to a table?

[Karen Goh <karenworld@xxxxxxxxx>]

On Sunday, July 21, 2019, 11:06:16 PM GMT+8, David G. Johnston <david.g.johnston@xxxxxxxxx> wrote:


On Sunday, July 21, 2019, Karen Goh <karenworld@xxxxxxxxx> wrote:


Is there a way for me to generate an entity table diagram vis pgAdmin4 or PSQL ?


Just write the 5 or so tables out in a somewhat compressed format. Psql doesn’t and I don’t know about pgadmin

Here is a compressed format :

s_tutor
--------
zipcode(text)
tutor_id (I just checked this is becomes a 'serial id ?' based on the generated sql

ALTER TABLE public.s_tutor ALTER COLUMN tutor_id ADD GENERATED BY DEFAULT AS IDENTITY (
SEQUENCE NAME public.tutor_strtutorid_seq
START WITH 1
INCREMENT BY 1
NO MINVALUE
NO MAXVALUE
CACHE 1
);

tutor_subject
----------------
tutor_id
subject_Names



David J.