Create Dimension Table From Fact Table!!

I have picked an exmple from this forum, to help me explain my current problem...

"I'm looking for a solution to import data from a flat file into an normalized data modell. To explain it a little simpler think about to following:

The Data Souce is a CSV-File with FirstName, LastName and Category. Sample data could be

Dirk; Bauer; sailing
Peter; Bauer; fishing
Marc; Bauer; reading

In my data modell I have defined the 2 tables "Person" and "Category":

Table "Person"
----------------
[PersonID] [int] IDENTITY(1,1) NOT NULL
[CategoryID] [int] NOT NULL
[FirstName] [nvarchar](50)
[LastName] [nvarchar](50)

Table "Category"
----------------
[CategoryID] [int] IDENTITY(1,1) NOT NULL
[CategoryName] [nvarchar](50)

Now I like to read my first row from the source and lookup a value for the CategoryID "sailing". As my data tables are empty right now, the lookup is not able to read a value for "sailing". Now I like to insert a new row in the table "Category" for the value "sailing" and receive the new "CategoryID" to insert my values in the table "Person" INCLUDING the new "CategoryID".

I think this is a normal way of reading data from a source and performing some lookups. In my "real world" scenario I have to lookup about 20 foreign keys before I'm able to insert the row read from the flat file source.

I really can't belief that this is a "special" case and I also can't belief that there is no easy and simple way to solve this with SSIS. Ok, the solution from Thomas is working but it is a very complex solution for this small problem. So, any help would be appreciated...

Thanks,
Dirk"



http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=74752&SiteID=1

Could someone help me creating the dimension table?

Thanks!!