Re: How would I write this query...

From: "Guy Rouillier" <guyr(at)masergy(dot)com>
To: <pgsql-general(at)postgresql(dot)org>
Subject: Re: How would I write this query...
Date: 2006-05-01 16:51:57
Message-ID: D4D1632DC736E74AB95FE78CD609007901260D@mtxexch01.add0.masergy.com
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Jim Fitzgerald wrote:
> Hi -
>
> I have two tables, one of them has names of people and an associated
> integer ID. The other table is a list of the people (from the first
> table) by their ID number that have signed up for a class. How would
> I write a query that would list all the people from the first table
> that do not have any entries in the second table? Basically, I want
> a listing of all my people who have not signed up for the class.

select *
from people
where id not in
(
select id
from class_registration
)

--
Guy Rouillier

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