Question about database tables behind charicteristic

Hi everyone,
<b>(1) what does the M table(view) of a charicteristic use for?</b> I find that the M view's structure is same as p table, so why the system create it?
<b>(2) what is the difference between NAV attribute and DIS attribute from database point of view?</b> I see that, if use NAV attribute in a characteristic's attribute, a X table will be generated, what does this x table use for?

Hi,
The M view.
Attributes from a IObj are stored in two tables: the P table for time independent attributes and the Q table for time dependent attr; the M view bring all attributes to be seen together (just press F1 positioning your cursor in the RSD1 screen on "view of MstrDta.." to get SAP explanation....) If your char doesn't have time indep attr, then the M view = the P table; otherwise it would be a mixture (e.g. 0COSTCENTER)
The X (/resp Y) table stores the relation between your master data SID and its time independent attributes (not only NAV) SIDs (resp time dependent). This table is used when preparing SELECT statements during reporting, F4 help and selection of data. Roughly it spares a join operation.
hope this helps...
Olivier.
Message was edited by:
Olivier Cora

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With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options
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SQL*Plus: Release 10.2.0.2.0 - Production on Wed Feb 20 12:19:50 2008
Copyright (c) 1982, 2005, Oracle. All Rights Reserved.
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Copyright (c) 1982, 2005, Oracle. All rights reserved.
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Copyright (c) 1982, 2005, Oracle. All Rights Reserved.
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I want to create, display, and maintain a data table of loan
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Murray --- ICQ 71997575
Adobe Community Expert
(If you *MUST* email me, don't LAUGH when you do so!)
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==================

Thanks, Pat. I'm pretty sure that this is a dead-end
expansion. The site
itself will surely expand, but I think this particular need
will be
informational only....
Murray --- ICQ 71997575
Adobe Community Expert
(If you *MUST* email me, don't LAUGH when you do so!)
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"Pat Shaw" <[email protected]> wrote in message
news:[email protected]...
> But if the site ever wants to expand on it's
functionality etc. it can be
> very difficult to get round a de-normalised database.
You can find that
> you have tied yourself in knots and the only solution is
to go back and
> redesign the database which often includes major
redesigning of the
> fron-end too.
>
> If you are confident that this will not be the case then
go with your
> initial thoughts but don't be too lenient just in case.
Leave yorself a
> little scope. I always aim for 3rd normal form as this
guarantees a robust
> database design without being OTT.
>
> Pat.
>
>
> "Joris van Lier" <[email protected]> wrote in
message
> news:[email protected]...
>>
>>
>> "Murray *ACE*"
<[email protected]> wrote in message
>> news:[email protected]...
>>> I want to create, display, and maintain a data
table of loan rates.
>>> These rates will be for two loan categories -
Conforming and Jumbo.
>>> They will be for two loan terms - 15year and
30year. Within each term,
>>> there will be a display of -
>>>
>>> points (0, 1, 3) - rate - APR
>>>
>>> For example -
>>>
>>> CONFORMING
>>> 30 year
>>> POINTS RATE APR
>>> ----------- --------- ------
>>> 0 6.375 6.6
>>> 1 6.125 6.24
>>> 3 6.0 6.12
>>>
>>> My first question is -
>>>
>>> Would it be better to set up the database with 5
fields (category, term,
>>> points, rate, apr), or 13 fields (category,
30_zeropointRate,
>>> 30_onepointRate, 30_threepointRate,
30_zeropointAPR, 30_onepointAPR,
>>> 30_threepointAPR, 15_zeropointRate,
15_onepointRate, 15_threepointRate,
>>> 15_zeropointAPR, 15_onepointAPR,
15_threepointAPR)?
>>>
>>> The latter option would mean that my table would
only contain two
>>> records - one for each of the two categories. It
seems simpler to
>>> manage in that regard.
>>>
>>> Any thoughts, suggestions, recommendations?
>>
>> In my opinion, normalizing is not necessary with
small sites, for example
>> the uber-normalized database design I did for the
telcost compare matrix
>> (
http://www.artronics.nl/telcostmatrix/matrix.php
) proved to be totally
>> overkill.
>>
>> Joris
>
>

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