RE: RE: Using dimensions

[Stephane Paquette]

Title: 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 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of [EMAIL PROTECTED] 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:[EMAIL PROTECTED] 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 ([EMAIL PROTECTED]) (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:[EMAIL PROTECTED] 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 !