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Home -> Community -> Mailing Lists -> Oracle-L -> 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
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 !
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Stephane Paquette INET: stephane.paquette_at_standardlife.ca 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 - 13:39:43 CDT
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