dimension attribute denormalisation in fact table

data as an attribute on a dimension or a key on the fact table

Hi, I am in the process of trying to model a mortgage (origination/servicing) data mart. For requirements all I was given at this point is a spreadsheet of attributes. My plan was to try and pull out dimensions and metrics from the list and then have a

fact table as a dimension

Hi I'm presently modeling a data mart and I would like to use a fact table as a dimension for another fact table. Is it something doable and efficient or is there a better way to do that? if yes should i just create a surrogate key and link both

Deriving Dimension attributes from Fact table

Hi, I have a Customer_Activity fact table which stores the the Activity Start & End Date values. I need to derive the last time the customer had an activity before the current date (based on the Activity End Date - MAX(Activity End Date) WHERE Activity

Same attribute in multiple dimensions or Create new dimension?

Hi all - I'm struggling with this concept. I have 2 dimensions: Customer and Products. Both share a common single attribute that I'll just call "Owner" for now. If a customer purchased a product, the owner would be the same for both. I

Fact Table Indexing Strategy

Please explain the indexing strategy which is in use in your organisation for fact tables in your current database(oracle, sybase, db2) Specify volume as the indexing strategy may be based upon the volume of data. Is there a well laid out strategy

Transactional detail fact table w/complimentary snapshot table. How do the two play together?

Take a detail daily banking transaction table with standard credit and debit level transactions. I want to build the accompanying snapshot that would present the higher level rollups of these lower transactions: There are about 250 daily transaction

Sparse dimensions, how to handle?

I've purchased the book "The Microsoft Data Warehouse Toolkit" and have reviewed it in order to build out a data warehouse solution I am currently designing. I am stuck in a spot that I don't seem to find any examples of , or am not abl

Fact table with multiple date ?

Hi, I am modling a fact table for prisoners inscription in order to track historical changes. An admission is the hole stay comprise of one or many inscriptions usually separated by transferts between institutions. In the transactionnal system, it

Multi valued dimension attributes, weighting factor and cognos

Hi, we have several attributes in our product and customer dimension which might by multi valued. We modelled these as multi valued dimension attributes using bridge tables and weighting factors therein. Can anybody reference a best practice

Audit Dimension Help

Hello all. I'm at the stage now where im building the audit dimension for my warehouse. I am having a little trouble figuring out a few things though. How do you aggregate the data from the error event fact table into the audit dimension? Some records

Bridge Table and Customer Hierarchy

Does anyone know of a good detailed reference that discusses populating and maintaining customer hierarchy type bridge tables? The only decent resource I've found is the "The Data Warehouse ETL Tool Kit", but it only briefly shows an example on

Random Facts October

They grow up so fast! RF: The staff is organising a birthday party for the forum, but don't tell anyone!

Dimension loading sources

Hi all, It's about datawarehouse dimension loading : should i load dimension from a master data management referential or from the truth of my business application. In the first case, dimension will be cleaner than in the second case but it will not