Not sanity. The basic requirement is: Questioning the sanity!!!!!! Yechiel Adar, Mehish Computer Services [EMAIL PROTECTED]
> -----Original Message----- > From: April Wells [SMTP:[EMAIL PROTECTED]] > Sent: Thu, February 28, 2002 2:13 PM > To: Multiple recipients of list ORACLE-L > Subject: RE: Re[2]:RE: Manager decrees "his" data warehouse design. > Help > > Sanity? A requirement? SINCE WHEN? > > -----Original Message----- > Sent: Wednesday, February 27, 2002 4:33 PM > To: Multiple recipients of list ORACLE-L > > > I don't know about questioning the design, it's more like questioning the > sanity > of the duhveloper. It's one of those more basic requirements. > > Dick Goulet > > ____________________Reply Separator____________________ > Author: [EMAIL PROTECTED] > Date: 2/27/2002 11:31 AM > > I think the column limit is now closer to 1000, but like you, I can't > imagine > willingly designing a table with a column count exceeding 2 digits. > > More than 15 or 20 and I start to question the design. > > Jared > > > > > > [EMAIL PROTECTED] > Sent by: [EMAIL PROTECTED] > 02/27/02 10:58 AM > Please respond to ORACLE-L > > > To: Multiple recipients of list ORACLE-L > <[EMAIL PROTECTED]> > cc: > Subject: Re:RE: Manager decrees "his" data warehouse > design. > Help! > > > I seem to remember reading somewhere that there can be a maximum of 255 > columns > in a table. Never created a table with half that many before. > > Dick Goulet > > ____________________Reply Separator____________________ > Author: [EMAIL PROTECTED] > Date: 2/27/2002 10:28 AM > > April, > > I sincerely hope you're being facetious with the statement that > "queries run so much faster if you take all the joins out" > > 1000 columns!? > How many rows like that will fit in a block? Your system has to wade > through > a lot of extraneous data to get a few columns for a query. > > How do you index it? You can't. > > It would be most interesting if you share your benchmarks with us. > > Jared > > > > > > > > April Wells <[EMAIL PROTECTED]> > Sent by: [EMAIL PROTECTED] > 02/27/02 03:48 AM > Please respond to ORACLE-L > > > To: Multiple recipients of list ORACLE-L > <[EMAIL PROTECTED]> > cc: > Subject: RE: Manager decrees "his" data warehouse design. > Help! > > > I agree, but at all costs... DOCUMENT EVERYTHING so it proves you made > your > suggestions and then went by the book on following what he decreed. We > are > facing similar problems (although not quite to your degree) and we are > going > to do two proof of concepts... on that denormalizes EVERYTHING into big > GIANT tables (very nearly 1000 columns each)... because queries run so > much > faster if you take all the joins out... and one using a star-flake kind of > model because it follows the standard (to the Nth degree)... we will ADOPT > something about halfway in between... but we need to waste the time now > following protocol to prove what we already know. > > Good Luck! > ajw > > -----Original Message----- > Sent: Wednesday, February 27, 2002 3:18 AM > To: Multiple recipients of list ORACLE-L > > > Don, > if as you are saying this guy is v headstrong then use the "Chinese > approach". > 1. Ensure that you have backed up your argument with a design or at least > a > doc outlining your approach showing that views and associated tables will > ensure performance ..... > 2. Send your emails to him and to others so that there is a trace. > 3. Then wait and let it blow up. This should not take too long as the > spec never included any indexes either. > This way you have followed his design to the letter. > 4. Let the users kill him when they have to wait 2 hours for the statement > to return a value. > 4. This means that you will have time to perfect a design using a CASE > tool. > 5. In the end his table could be used as a staging area > > Just wait don't get annoyed, smile. > Just think you can have his job soon. > > > > Kind Regards > Peter Lomax (Oracle DBA) > Expertise Oracle > ORANGE/DSI/SIMBAD/AT&P > OrangeFrance > Bureau: > email: [EMAIL PROTECTED] > tel: (+33) (0)1 55 22 59 13 > fax: (+33) (0)1 55 22 39 69 > Simbad sailing through UMTS. > > > -----Message d'origine----- > De : Don [mailto:[EMAIL PROTECTED]] > Envoye : mercredi 27 fevrier 2002 07:48 > A : Multiple recipients of list ORACLE-L > Objet : Manager decrees "his" data warehouse design. Help! > > > I've lost patience, my temper, and I'm about to quit a job because the IT > manager has decreed that we will have "his" data warehouse running within > 24 hours, and we will use his design. > > 1 - We are NOT to use any kind of views, not even materailzed views. > 2 - we are not to do any computations, summaries or rollups > 3 - we are to have everything in one table > 4 - "the" table name and column names will be meaningful to any clerk > 5 - we are not to "start" or "snowflake" designs. "That's just a bunch of > > > > high power talk." > 6 - all users will be trained to use MS Access to get at "their" > data. (These are users that were just converted off from "green screen" > teminals within the last 45-days, to Windows 98 with 64k RAM.) > 7 - We are not to just copy the legacy transactions. > 8 - We are to load into "an" Oracle table, all legacy transction data > because "we don't want to limit how or what a user will look at" > 9 - It is not necessary to talk with the users to see what data they want > to look at, or the atomic level. "They are smart enough to fighure this > out on their own. We just need to provide them the data." > 10 - There shall be no long term maintenance required by "the" dw. > > > Any ideas on how to deal with this situation? > > For tomorrow, I've done a CTAS from a materialized view that we created to > > > > support one departments known requirements. > > > Don > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Don > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing Lists > -------------------------------------------------------------------- > 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). > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing Lists > -------------------------------------------------------------------- > 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). > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: April Wells > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing Lists > -------------------------------------------------------------------- > 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). > > > > > The information contained in this e-mail is strictly confidential and for > the intended use of the addressee only; it may also be legally privileged > and/or price sensitive. 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