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Data Bases > Databases General > Re: Hundreds of...
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Re: Hundreds of columns, index on all of those.

by "David Cressey" <cressey73@[EMAIL PROTECTED] > May 7, 2008 at 07:26 PM

<rock_sand81@[EMAIL PROTECTED]
> wrote in message
news:6d791729-8f7b-47c5-b0fc-80c42aa25d4b@[EMAIL PROTECTED]
> Topic: Hundreds of columns, index would be required on all of the
> columns.
>
> Hi!
>
> How could this be implemented?
>

This IS an implementation.

Why don't you tell us what problem you were trying to solve,  and then let
us tell you about the prose and cons of various designs and
implementations.

What leads you to require so many columns?   Why is an index required on
all
columns?
Does each column specify exactly one attribute?  Do all the attributes
describe the same "thing"  (object, entity,  whatever) (or relation****p
among two or more "things") in the subject matter universe of discourse?
How do you plan on dealing with situations where there is a row, and a
column,  but no value that ought to be stored in the intersetion of the
given row and the given column?
 




 16 Posts in Topic:
Hundreds of columns, index on all of those.
rock_sand81@[EMAIL PROTEC  2008-05-06 00:05:09 
Re: Hundreds of columns, index on all of those.
Jeff North <jnorth@[EM  2008-05-06 07:54:21 
Re: Hundreds of columns, index on all of those.
Marco Mariani <marco@[  2008-05-06 10:05:27 
Re: Hundreds of columns, index on all of those.
Thomas Kellerer <YQDHX  2008-05-06 15:15:31 
Re: Hundreds of columns, index on all of those.
Marco Mariani <marco@[  2008-05-06 10:09:02 
Re: Hundreds of columns, index on all of those.
rock_sand81@[EMAIL PROTEC  2008-05-06 03:25:50 
Re: Hundreds of columns, index on all of those.
Marco Mariani <marco@[  2008-05-06 13:08:06 
Re: Hundreds of columns, index on all of those.
rock_sand81@[EMAIL PROTEC  2008-05-06 04:41:23 
Re: Hundreds of columns, index on all of those.
Marco Mariani <marco@[  2008-05-06 15:06:57 
Re: Hundreds of columns, index on all of those.
Ed Prochak <edprochak@  2008-05-06 05:45:54 
Re: Hundreds of columns, index on all of those.
--CELKO-- <jcelko212@[  2008-05-07 09:51:29 
Re: Hundreds of columns, index on all of those.
"David Cressey"  2008-05-07 19:26:47 
Re: Hundreds of columns, index on all of those.
rock_sand81@[EMAIL PROTEC  2008-05-07 22:23:56 
Re: Hundreds of columns, index on all of those.
rock_sand81@[EMAIL PROTEC  2008-05-07 23:34:52 
Re: Hundreds of columns, index on all of those.
Ed Prochak <edprochak@  2008-05-08 05:29:54 
Re: Hundreds of columns, index on all of those.
rock_sand81@[EMAIL PROTEC  2008-05-09 04:04:06 

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tan12V112 Fri Dec 5 9:36:19 CST 2008.