Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> RE: RE: Using dimensions

RE: RE: Using dimensions

From: <rgaffuri_at_cox.net>
Date: Mon, 29 Sep 2003 11:54:46 -0800
Message-ID: <F001.005D1636.20030929115446@fatcity.com>


so basically your saying you use dimensions hand in hand with materialized views.

do they have other uses?
>
> From: "Stephane Paquette" <stephane.paquette_at_standardlife.ca>
> Date: 2003/09/29 Mon PM 02:39:43 EDT
> To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> Subject: RE: RE: Using dimensions
>
> Using dimensionsI`ve not used dimensions in Oracle only read about them.
> But I have designed DW using dimensional modeling. So from what I've read in
> the doc, Oracle will used the dimensions to be better at query rewriting
> because it knows the hierarchy of the data (example : neighbourhood, city,
> region, province, country)
>
> Stephane Paquette
> Administrateur de bases de donnees
>
> Database Administrator
>
> Standard Life
>
> www.standardlife.ca
>
> Tel. (514) 499-7999 7470 and (514) 925-7187
>
> stephane.paquette_at_standardlife.ca
>
> -----Original Message-----
> From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com]On Behalf Of
> rgaffuri_at_cox.net
> Sent: Monday, September 29, 2003 2:20 PM
> To: Multiple recipients of list ORACLE-L
> Subject: Re: RE: Using dimensions
>
>
> Thanks Scott, okay lets forget OLTP .. but I haven't seen any _actual_
> uses of dimensions ... where does one use them? in SQLs?
>
> I have scanned TFM, but haven't STFW'd yet ... scared of too many hits.
>
> Thanks
> Raj
> --------------------------------------------------------------------------
> ------
> Rajendra dot Jamadagni at nospamespn dot com
> All Views expressed in this email are strictly personal.
> QOTD: Any clod can have facts, having an opinion is an art !
> -----Original Message-----
> From: Scott Canaan [mailto:srcdco_at_rit.edu]
> Sent: Monday, September 29, 2003 11:55 AM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: Using dimensions
>
>
> Dimensions are data warehouse constructs. They are implemented as
> tables in the database, but have the characteristic of a hierarchy that can
> be traversed. For example: a time dimension can have the hierarchy of
> date, day, week, month, quarter, year, decade, century. This is used for
> rollup reporting within the data mart. I don't see any good use of it in an
> OLTP environment, but I may be wrong.
>
>
>
> Scott Canaan (srcdco_at_rit.edu)
>
> (585) 475-7886
>
> "Life is like a sewer, what you get out of it depends on what you put
> into it." - Tom Lehrer.
>
>
>
> -----Original Message-----
> From: Jamadagni, Rajendra [mailto:Rajendra.Jamadagni_at_espn.com]
> Sent: Monday, September 29, 2003 10:55 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Using dimensions
>
>
>
> I have tried, but haven't found a good example of how to _use_ a
> dimension in 9ir2. I defined one, but then sat clueless on what to do with
> it. Is it any good in an OLTP environment? (I smell the answer is a NO, but
> still) ...
>
> Any notes from your experience?
>
> TIA
> Raj
> ------------------------------------------------------------------------
> --------
> Rajendra dot Jamadagni at nospamespn dot com
> All Views expressed in this email are strictly personal.
> QOTD: Any clod can have facts, having an opinion is an art !
>
>
>



Using dimensions





I`ve not used dimensions in Oracle only read about them.
But I have designed DW using dimensional modeling. So from what I've read in the doc, Oracle will used the dimensions to be better at query rewriting because it knows the hierarchy of the data (example : neighbourhood, city, region, province, country)
 

Stephane Paquette

Administrateur de bases de donnees

Database Administrator

Standard Life

www.standardlife.ca

Tel. (514) 499-7999 7470 and (514) 925-7187

stephane.paquette@standardlife.ca

-----Original Message-----
From: ml-errors@fatcity.com [mailto:ml-errors@fatcity.com]On Behalf Of rgaffuri@cox.net
Sent: Monday, September 29, 2003 2:20 PM
To: Multiple recipients of list ORACLE-L
Subject: Re: RE: Using dimensions

Thanks Scott, okay lets forget OLTP .. but I haven't seen any _actual_ uses of dimensions ... where does one use them? in SQLs?
 
I have scanned TFM, but haven't STFW'd yet ... scared of too many hits.
 
Thanks
Raj
--------------------------------------------------------------------------------
Rajendra dot Jamadagni at nospamespn dot com
All Views expressed in this email are strictly personal.
QOTD: Any clod can have facts, having an opinion is an art !
-----Original Message-----
From: Scott Canaan [mailto:srcdco@rit.edu]
Sent: Monday, September 29, 2003 11:55 AM
To: Multiple recipients of list ORACLE-L
Subject: RE: Using dimensions

Dimensions are data warehouse constructs.  They are implemented as tables in the database, but have the characteristic of a hierarchy that can be traversed.  For example:  a time dimension can have the hierarchy of date, day, week, month, quarter, year, decade, century.  This is used for rollup reporting within the data mart.  I don't see any good use of it in an OLTP environment, but I may be wrong.

 

Scott Canaan (srcdco@rit.edu)

(585) 475-7886

"Life is like a sewer, what you get out of it depends on what you put into it." - Tom Lehrer.

 

-----Original Message-----
From: Jamadagni, Rajendra [mailto:Rajendra.Jamadagni@espn.com]
Sent: Monday, September 29, 2003 10:55 AM
To: Multiple recipients of list ORACLE-L
Subject: Using dimensions

 

I have tried, but haven't found a good example of how to _use_ a dimension in 9ir2. I defined one, but then sat clueless on what to do with it. Is it any good in an OLTP environment? (I smell the answer is a NO, but still) ..

Any notes from your experience?

TIA
Raj
--------------------------------------------------------------------------------
Rajendra dot Jamadagni at nospamespn dot com
All Views expressed in this email are strictly personal.
QOTD: Any clod can have facts, having an opinion is an art !

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: <rgaffuri_at_cox.net
  INET: rgaffuri_at_cox.net

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).
Received on Mon Sep 29 2003 - 14:54:46 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US