Comments on: Designer SQL Traps http://www.dagira.com/2007/08/03/designer-sql-traps/ ...you are in a twisty maze of passageways, all different... Tue, 07 Feb 2012 17:17:49 -0600 http://wordpress.org/?v=2.8.4 hourly 1 By: Dave Rathbun http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-1988 Dave Rathbun Mon, 17 Oct 2011 12:27:28 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-1988 My primary reference is the standard Business Objects training material. If you read the description of each kind of trap, it logically makes far more sense to define a fan trap as A -< B -- A -< C if you ask me. If you want to call them something different go ahead. :) My primary reference is the standard Business Objects training material. If you read the description of each kind of trap, it logically makes far more sense to define a fan trap as A -< B — A -< C if you ask me. If you want to call them something different go ahead. :)

]]> By: Mikhail Khludnev http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-1986 Mikhail Khludnev Mon, 17 Oct 2011 07:11:24 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-1986 I looked into wiki again it opposite to yours. And one more reference can be easily googled http://www.google.com/search?q=Oracle+Discoverer%27s+Fan+Trap+Resolution the first result is old pdf from Oracle. they depict fan as Sales >- Account -< Budget and you draw "fan" as A -< B -< C Could you give me a link to your reference materials ? Best wishes I looked into wiki again it opposite to yours. And one more reference can be easily googled http://www.google.com/search?q=Oracle+Discoverer%27s+Fan+Trap+Resolution the first result is old pdf from Oracle.
they depict fan as Sales >- Account -< Budget and
you draw "fan" as A -< B -< C

Could you give me a link to your reference materials ?

Best wishes

]]> By: Dave Rathbun http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-1976 Dave Rathbun Fri, 14 Oct 2011 12:48:09 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-1976 The Wiki article you linked agrees with my description, however you linked to the wrong area. I believe you meant http://en.wikipedia.org/wiki/Relational_model#Modelling_issues instead. The other article you linked is incorrect. The Wiki article you linked agrees with my description, however you linked to the wrong area. I believe you meant http://en.wikipedia.org/wiki/Relational_model#Modelling_issues instead. The other article you linked is incorrect.

]]> By: Mikhail http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-1973 Mikhail Fri, 14 Oct 2011 09:41:16 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-1973 these definitions are completely opposite to http://db.grussell.org/section005.html http://en.wikipedia.org/wiki/Relational_model#cite_note-7 pls let me know what does it mean? these definitions are completely opposite to http://db.grussell.org/section005.html http://en.wikipedia.org/wiki/Relational_model#cite_note-7 pls let me know what does it mean?

]]> By: AVRIL http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-154 AVRIL Thu, 13 Dec 2007 02:41:36 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-154 Hi Dave, Thanks for letting me know about“ZEN and the ART of Universe Design”. It is good for a start as i am new to Business Objects. And while making universe the core problem for me has been resolving loops. I really get confused about when to use aliases and when to use context when there are so many tables (atleast 10+) and its just not one lookup where i can use alias and contexts for others. This has landed me making mistakes. I would really appreciate any valuable inputs from you as i need some help to get these basics very clear. Regards, Avril. Hi Dave,
Thanks for letting me know about“ZEN and the ART of Universe Design”. It is good for a start as i am new to Business Objects. And while making universe the core problem for me has been resolving loops. I really get confused about when to use aliases and when to use context when there are so many tables (atleast 10+) and its just not one lookup where i can use alias and contexts for others. This has landed me making mistakes. I would really appreciate any valuable inputs from you as i need some help to get these basics very clear.

Regards,
Avril.

]]> By: Dave Rathbun http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-149 Dave Rathbun Thu, 29 Nov 2007 06:10:38 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-149 AVRIL, this has been on my list to update for a while, but time constraints have prevented me from finishing. I have written some articles that are posted on the Integra Solutions web site, including one called "ZEN and the ART of Universe Design" as well as some older conference presentations that would be a start if you have not seen those. Unfortunately, our site appears to be down at the moment, and I am not sure why. :-? AVRIL, this has been on my list to update for a while, but time constraints have prevented me from finishing. I have written some articles that are posted on the Integra Solutions web site, including one called “ZEN and the ART of Universe Design” as well as some older conference presentations that would be a start if you have not seen those.

Unfortunately, our site appears to be down at the moment, and I am not sure why. :-?

]]> By: AVRIL http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-145 AVRIL Fri, 23 Nov 2007 03:10:16 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-145 Hi Dave, Tried searching for more content on Chasm and Fan Traps but didnt find any? Just wanted to know if there is any more content about the traps in detail. Hi Dave,
Tried searching for more content on Chasm and Fan Traps but didnt find any? Just wanted to know if there is any more content about the traps in detail.

]]> By: Marg http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-61 Marg Fri, 24 Aug 2007 22:23:41 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-61 Thanks Dave. My question was along the lines of how to present information at the report level when you cross contexts - particularly when a lot of dimension information is required. It's not often possible to convert the dimensions to details. I understand the logic behind using contexts particularly with chasm traps - I just find it hard to write neat looking reports. For some reason my users like reports that look like Excel :( Thanks Dave.
My question was along the lines of how to present information at the report level when you cross contexts – particularly when a lot of dimension information is required.
It’s not often possible to convert the dimensions to details.
I understand the logic behind using contexts particularly with chasm traps – I just find it hard to write neat looking reports. For some reason my users like reports that look like Excel :(

]]> By: Dave Rathbun http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-54 Dave Rathbun Thu, 23 Aug 2007 13:29:12 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-54 Hi, Marg, unfortunately your comment got cut-off. Wordpress doesn't like characters like < and > in comments as it thinks you might be trying to post some inappropriate links. Unfortunately I don't know of a way to fix that without breaking the ability to post legitimate links. What you can do is avoid those characters in your comments, or - like I did in this case - replace them with the html equivalent of & lt ; for less than and & gt ; for greater than. Simply put all 4 of those characters & lt ; together and it will turn out as <. My apologies for the confusion. I do certainly intend to cover contexts in some detail as they are an essential tool for solving both fan and chasm traps. Hopefully I will provide your answer even if I don't know the exact question. :) Hi, Marg, unfortunately your comment got cut-off. Wordpress doesn’t like characters like < and > in comments as it thinks you might be trying to post some inappropriate links. Unfortunately I don’t know of a way to fix that without breaking the ability to post legitimate links. What you can do is avoid those characters in your comments, or – like I did in this case – replace them with the html equivalent of & lt ; for less than and & gt ; for greater than. Simply put all 4 of those characters & lt ; together and it will turn out as <. My apologies for the confusion.

I do certainly intend to cover contexts in some detail as they are an essential tool for solving both fan and chasm traps. Hopefully I will provide your answer even if I don’t know the exact question. :)

]]> By: Marg http://www.dagira.com/2007/08/03/designer-sql-traps/comment-page-1/#comment-53 Marg Thu, 23 Aug 2007 09:40:43 +0000 http://www.dagira.com/2007/08/03/designer-sql-traps/#comment-53 Dave, I'd be interested to see some information on report formatting when crossing multiple contexts. A common request I come across is for information (both dimensions and measures) to be displayed in one block, when they come from different contexts. For example, say you have Projects - Dave,

I’d be interested to see some information on report formatting when crossing multiple contexts. A common request I come across is for information (both dimensions and measures) to be displayed in one block, when they come from different contexts. For example, say you have

Projects -

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