Re: time/date as key fields

[Alan Campin <alan0307d@xxxxxxxxx>]

Use an identity field and big integer and that's your primary key. The whole
thing is now managed by the OS and you don't need to worry about it.

On Fri, Nov 19, 2010 at 8:24 AM, <dieter.bender@xxxxxxxxxxxx> wrote:

> ... normaly I would prefer to generate the Ids by my own, identity columns
> are looking to me like coming thru the backdoor. Writing a column to the
> database and looking afterwards, what I have written...
>
> Dieter
>
> --------------------------------------------------
> From: "Richard Schoen" <richard@xxxxxxxxxxxxxxx>
> Sent: Friday, November 19, 2010 3:41 PM
> To: <midrange-l@xxxxxxxxxxxx>
> Subject: Re: time/date as key fields
>
> > A combination of _GENUUID, Verns timestamp routine and job info would
> most
> > likely guarantee uniqueness :-)
> >
> > Otherwise an Identity field in the database indeed guarantees it.
> >
> > Curiousity question:
> >
> > How many of you are using Identity fields in databases for new
> > applications ?
> >
> > In the past we always created the base key such as Customer Number, Order
> > Number  and that was the primary key.  Now I think the wisdom is to
> always
> > use an identity field for primary key as well as Customer Number, Order
> > Number, etc.... as indexes.
> >
> > Would like to hear thoughts ?.....
> >
> > Regards,
> > Richard Schoen
> > RJS Software Systems Inc.
> > Where Information Meets Innovation
> > Document Management, Workflow, Report Delivery, Forms and Business
> > Intelligence
> > Email: richard@xxxxxxxxxxxxxxx
> > Web Site: http://www.rjssoftware.com
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> >
> >
> > ------------------------------
> >
> > message: 9
> > date: Fri, 19 Nov 2010 15:07:43 +0100
> > from: <dieter.bender@xxxxxxxxxxxx>
> > subject: Re: time/date as key fields
> >
> > ... it depends, maybe for referential constraints, if there are database
> > relations.
> > BTW: genUUID on AS/400 is only most likely unique!!! Best choice would be
> > an
> > identity column, if uniqueness is needed.
> >
> > D*B
> >
> >
> > --
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