A few simple (?) dimension questions...

Hi, I have a few really simple dimension questions that I just can't figure out in OWB (which I'm just now starting to play with):
1) I'm trying to create a dimension that has no levels or any hierarchy. In the BI tool, I just want this dimension to act as a "pick list" for one of 8 values (DW data snapshot dates for the last 8 weeks...) Users won't summarize by this dimension, or ever have more than 1 week selected at a time. How can I set this type of dimension up?
2) Somewhat related to #1 - just to get something working, I set up a "time in weeks" dimension not as a time dimension, just as a normal user dimension. I then added a single "weeks" level with a surrogate key (using "key" instead of "id"), short desc (as the business key), and long description. Set up a mapping from my source table, everything worked fine. The strange thing I've notcied is that the relational table produced has both a "week_key" column and a "dimension_key" column. How can I get rid of the "dimension_key" column - its just an exact duplicate of the lowest level key column? Note - we will have a dimension table with over 1.3 BILLION rows in our warehouse - so duplicating this column does add a significant amount of overhead - this isn't just an academic problem.
3) related to building this "test" dimension - my source table has 8 records in it. Whenever I run the ETL to populate the dimension table, the surrogate keys end up being key values 9 - 16 instead of 1 - 8. Note this is even if I reset the sequence number to 1 before I start, etc. My understanding is that Oracle uses a variable width number field when storing data - so having this dimension with values 1-8 instead of 9-16 saves approx a byte for every fact table record (which we're predicting will be in the range of 20 - 50 BILLION rows). How can I force the dimension to start numbering at 1?
Thanks in advance,
Scott

Hi
Reg #2, I do not think we can get rid of the "dimension key". It looks like OWB is creating this column as a default Primary Key and hence is not possible to remove this. May be if we build the base Table for dimension as a normal relational table, which will allow us to define our own keys, and then build the "Dimension" using AWM on this relation table may resolve the issue of having duplicate primary keys. Its only a thougt, have not tested though.
rgds
Mahesh

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Date: Fri, 4 Nov 2011 05:35:16 -0600
From: [email protected]
To: [email protected]
Subject: 4 Simple Flash Questions that Are Stumping Me!
    Re: 4 Simple Flash Questions that Are Stumping Me!
    created by Ned Murphy in Flash Pro - General - View the full discussion
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Is there a way to send files via drag n drop
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