Date: Sun, 21 Jul 2019 15:10:31 +0000 (UTC)
From: Karen Goh <karenworld@yahoo.com>
To: "David G. Johnston" <david.g.johnston@gmail.com>
Cc: pgsql-admin@lists.postgresql.org, Ron <ronljohnsonjr@gmail.com>
Message-ID: <2030754658.2646264.1563721831668@mail.yahoo.com>
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Subject: Re: How do I alter an existing column and add a foreign key which
 is a Primary key to a table?
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=20


On Sunday, July 21, 2019, 11:06:16 PM GMT+8, David G. Johnston <david.g.joh=
nston@gmail.com> wrote:


On Sunday, July 21, 2019, Karen Goh <karenworld@yahoo.com> 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 doe=
sn=E2=80=99t and I don=E2=80=99t 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 gener=
ated sql

ALTER TABLE public.s_tutor ALTER COLUMN tutor_id ADD GENERATED BY DEFAULT A=
S 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.
 =20
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<div>                <br><br><br><br><br>On Sunday, July 21, 2019, 11:06:16=
 PM GMT+8, David G. Johnston &lt;david.g.johnston@gmail.com&gt; wrote:<br><=
br><br>On Sunday, July 21, 2019, Karen Goh &lt;karenworld@yahoo.com&gt; wro=
te:<br><br><br>    Is there a way for me to generate an entity table diagra=
m vis pgAdmin4 or PSQL ?<br><br><br>Just write the 5 or so tables out in a =
somewhat compressed format.  Psql doesn=E2=80=99t and I don=E2=80=99t know =
about pgadmin<br><br>Here is a compressed format :<br><br>s_tutor<br>------=
--<br>zipcode(text)<br>tutor_id (I just checked this is becomes a &#39;seri=
al id ?&#39; based on the generated sql<br><br>ALTER TABLE public.s_tutor A=
LTER COLUMN tutor_id ADD GENERATED BY DEFAULT AS IDENTITY (<br>    SEQUENCE=
 NAME public.tutor_strtutorid_seq<br>    START WITH 1<br>    INCREMENT BY 1=
<br>    NO MINVALUE<br>    NO MAXVALUE<br>    CACHE 1<br>);<br><br>tutor_su=
bject<br>----------------<br>tutor_id<br>subject_Names<br><br><br><br>David=
 J.<br>            </div>           =20
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