Type -2 in OBIEE

Question

Guys,
We have type-II dimensions in our warehouse. We are using the start date and end date atttributes in the dimension to preserve the history.
So when we define the joins in the physical layer between fact and dim, I guess simply joining on the primary and foreign keys will not give what i want i guess.
So should i include any of those dim date attributes in the join?
Please guide
Thanks
prash

Answer 1

So I have a surrogate key and start date and end date in my dimension. What would be the generic way of joining to my fact table.
To be elaborate I have a org Dimension
The attributes are Org ID, start date, end date, AU(surrogate/natural key)
So we will have multiple ORG ID's for a particular AU's because of the different date ranges. But my surrogate key is the same in dim table
In my fact table i have my Org FKID and this point i am joining on pk-fk relationalship b/w the ORG and Fact. But i am missing something here
Should I include surrogate key in the fact table and join on the surrogate keys instead?
When the user wanted to see the old hierarchy date (08/15) and with latest fact table info(09/15) how does that work?
Should i join on surrogate key to fact table and expose the start dim and end dim date attributes to the users so that they will select the date of the hierarchies they wanted to see?
I am littile disjointed here on what is the best approach? But obviously i wanted to have one generic join condition b/w the fact and dim in physical that satisfies for every thing
please advice
thanks
prash
Edited by: Prash11 on Sep 14, 2010 5:07 PM