Raj - Actually a good place to start is the Oracle9i Data Warehousing Guide http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96520/logical. htm#97703 <http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96520/logical .htm#97703> I think it is important for all Oracle DBAs to understand the fundamental concepts behind DW. You never know when you'll get yanked into a meeting where they are discussing it and you don't want to say something Neanderthal like "of course we'll fully normalize the schema". Ralph Kimball has some good materials on his web site: http://www.ralphkimball.com <http://www.ralphkimball.com>
Dennis Williams DBA, 80%OCP, 100% DBA Lifetouch, Inc. [EMAIL PROTECTED] -----Original Message----- Sent: Monday, September 29, 2003 11:15 AM To: Multiple recipients of list ORACLE-L 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----- Sent: Monday, September 29, 2003 11:55 AM To: Multiple recipients of list ORACLE-L 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----- Sent: Monday, September 29, 2003 10:55 AM To: Multiple recipients of list ORACLE-L 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: DENNIS WILLIAMS INET: [EMAIL PROTECTED] 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: [EMAIL PROTECTED] (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).
