How do system tables relate to other tables in postgresql

From: "Graeme Longman" <graeme(at)saebex(dot)com>
To: <pgsql-general(at)postgresql(dot)org>
Subject: How do system tables relate to other tables in postgresql
Date: 2001-07-11 12:06:31
Message-ID: CDEFLKAODCGENNDCCFMJAEGICAAA.graeme@saebex.com
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Hi,

Hope you can help me out.

I'm trying to write a select statement which returns the all the columns of
a table with a 'not null' modifier.

I realise that I will need to use the system tables but can't work out which
columns of which system tables to include in my statement.

Thanks for any help in advance,
Graeme

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