Re: Eliminating Nulls
From: paul c <toledobythesea_at_oohay.ac>
Date: Fri, 01 Jul 2005 18:17:47 GMT
Message-ID: <fNfxe.1847064$6l.992031_at_pd7tw2no>
>
>
> Sure you have -- well, unless you are omniscient :) I have an arrival
> and departure date for any visit. Some one is still here so their
> departure is NULL (unknown, to-be-determined, known only to be after
> arrival, etc.). Thre is a lot of rtheory, especially in Stats, abut
> missing data.
>
Date: Fri, 01 Jul 2005 18:17:47 GMT
Message-ID: <fNfxe.1847064$6l.992031_at_pd7tw2no>
-CELKO- wrote:
>>>But i've never come across a "null" in the "real world" either. <<
>
>
> Sure you have -- well, unless you are omniscient :) I have an arrival
> and departure date for any visit. Some one is still here so their
> departure is NULL (unknown, to-be-determined, known only to be after
> arrival, etc.). Thre is a lot of rtheory, especially in Stats, abut
> missing data.
>
i'd say data about something that may well not happen is hardly missing. seems a little premature to try to put it into a database.
scheduled departure is a different matter, unless we're talking about death.
don't see what 'Stats' has to do with it.
p Received on Fri Jul 01 2005 - 20:17:47 CEST