InfoCube Star Shcema

Question

I am getting confused. In the documentation, it says the relationship between the Dimension and Fact Table is linked by the Dimension ID.:  (http://help.sap.com/erp2005_ehp_03/helpdata/EN/6f/c7553bb1c0b562e10000000a11402f/frameset.htm)
So say I have 3 InfoObject (2 are InfoObject Master Data) assigned in one Dimension in the InfoCube, then does it mena that there 3 Dimension ID will be stored in the Fact Table?
Please advice, thank you.

Answer 1

Hi Iynn,
Your DIM table will be like this
DIM ID         MATERIAL SID      VENDOR SID         PLAN SID
12                       3                          5                         8
Fact table will be like
DIM ID            QTY
  12                  10
Now we can check how the transaction is coming
suppose your transaction data coming like
MATERIAL     VENDOR      PLAN      QTY
10                    20                 30          10
Now the system will check Material's SID for the material number 10 then it will get it as '3' from the SID table of Material. Like this it will find out for Vendor and Plan. So the system will identify the SIDs of Material, vendor and plan as 3, 5, 8 respectively.
Then it will create an entry in the dimension table as below ::
DIM ID         MATERIAL SID      VENDOR SID         PLAN SID
12                       3                          5                         8
After that using this DIM ID it will link to the Fact table as below ::
DIM ID            QTY
  12                  10
This kind of modeling is known as Extended star schema.
You can refer the below link for Modeling ::
/people/githen.ronney3/blog/2008/02/13/modeling-strategies
Regards
Githen