system
November 15, 2010, 6:05pm
#1
Hello all,
I am having an issue with my universe and could greatly use your help.
I created the universe as below, however when you include gross sales and off invoice discount in a report, it will duplicate the gross sales whenever there is an off invoice discount.
Your assistance is greatly appreciated =)
spiike32 (BOB member since 2010-11-15)
system
November 15, 2010, 6:15pm
#2
Welcome to B:bob:B !
What is the cardinality of the join between FactSales table and FactOffInvoice table?
Very likely you are experiencing so called fan trap. Here is the explanation of the fan trap and how to resolve it:
What is a fan trap, why is it a problem, and how do I resolve it?
Dave Rathbun describes it well in his presentation, ZEN and the ART of Universe Design. Which is located here: http://www.dagira.com/conference-presentations/
Here is a quick synopsis of Fan Trap from his presentation:
A Fan Trap is a one - many - many relationship. This would happen if you are using a Summary and a Detail table in one query. Fan Traps can cause numbers to multiply. Business Objects resolves this tβ¦
Use search to find more topics that discuss the same problem. There should be many.
Marek Chladny (BOB member since 2003-11-27)