View pervious versions of row

From: Arnav <justdba03(at)gmail(dot)com>
To: pgsql-admin <pgsql-admin(at)postgresql(dot)org>
Subject: View pervious versions of row
Date: 2020-04-17 12:27:41
Message-ID: CAF0ZvMz+MJHjHfGONv7sBNtvc_ceUONL1tyGv+J5HCdqP2nr_w@mail.gmail.com
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hi Pgsql-Admin

What is the command to view the previous version of rows (deleted or
updated)

I searched and found some functions like : . But none of them are working
SELECT * FROM page_header(get_raw_page('school',0));
SELECT * FROM heap_page_items(get_raw_page('school',0));
^
Sorry if the question sounds stupid
--
Regards
Ankush

Regards
Arnav

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