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Date: Tue, 31 Oct 2006 19:48:43 +0100
From: "A. Kretschmer" <andreas.kretschmer@schollglas.com>
To: pgsql-sql@postgresql.org
Subject: Re: Table Relationships
Message-ID: <20061031184843.GA12767@a-kretschmer.de>
References: <031936836C46D611BB1B00508BE7345D04C02E82@gatekeeper.daycos.com>
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am  Tue, dem 31.10.2006, um 11:15:26 -0600 mailte Curtis Scheer folgendes:
> Given the following two tables:
> 
> CREATE TABLE public.task
> (
>   taskid int4 NOT NULL DEFAULT nextval('task_taskid_seq'::regclass),
>   description varchar,
>   CONSTRAINT pk_taskid PRIMARY KEY (taskid)
> )
> 
> public.users
> (
>   userid int4 NOT NULL,
>   username varchar,
>   CONSTRAINT pk_userid PRIMARY KEY (userid)
> )
> 
> I want to record which user ?performed the task? and which user ?checked the
> task?, I?ve come up with a few ideas on this but I would like to know what the
> correct way would be to implement this into my table design.

Perhaps a table like this:


(
    user int references public.users,
    task int references public.task,
    ts timestamptz default now(),
    action char(1) check (action in ('p','c'))
)


-- with p(perform), c(cheked)



HTH, Andreas
-- 
Andreas Kretschmer
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