Kimball Dimensions

Monster Dimensions

My customer list is huge (about 70 millionish). We currently have a 60 million row dimension (CUSTOMER) that holds most of our existing customers, and this existing large DIM is currently performing fine for us. Now my clients want to type 2 two

Mini Dimensions

Hi In out data warehouse design (superannuation) we need to cater for Client and Accounts and the relationship between them (a client can have one or more accounts). Some of the client attributes can change so we were thinking or having a client

Dates in many dimensions

Hello, I am new to DW. Currently, I am working on a Human Resource database. There are many tables in the source systems which stores dates e.g. dates about contract start, finish, Vacations of an employee, temporary service suspension and many more.

Junk Dimension Naming

What do you call your junk dimensions? Do you use "junk" in the dimension name? Junk implies garbage so I don't like using it. Most dimensions are easily named since they represent a single person, place, thing, concept, or event. Junk

Degenerate Dimensions

Hi there, I have come across a situation where my Fact table contains a degenerate 'Claim Number' column. This is fine, but I have discovered that some of the incoming data to populate my fact table do not have a claim number. How should I handle this

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

Flexiblity To Add Attributes To A Dimension And Not Process The Whole Cube/s

Hello, We are in the process of designing a DW for Games and have run into a business problem : Business users want to add attributes to a dimension and decide its level in the hierarchy on the fly. The new attributes should be availabe in reports

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

How to manage Conformed dimensions

Hi, If I'm implementing data mart by data mart, I build a dimension for the first data mart. After a few months, I realize I can use that dimension for the second data mart as a conformed dimension. But it needs additional columns. How do you manage this

How to handle a Type I or II dimension with a snowflaked customer sub dimension (kimball book page 337, 338)

Hello, Within Ralph his new book he describes recommanded situations for snowflaking a dimension. His example is a large customer (visitor) dimension. (page 337, 338 and figure 10-6). I find the artical good, but there is missing one part of this

Bridge table for patient diagnosis

Hi ngalemmo or fourm members, Can I get advice on how to create a bridge table for patient diagnosis? To keep it simple, I have a patient, facilities, and doctor dimensions and one fact table. For a specific patient, I need to show all diagnosis in a

Data Vault v's Dimensional Model

Seems to be a lot of interest over at LinkedIn around the DataVault model. I wondered what the thoughts were about it. When would you use it v's a Dimensional Model or even a 3NF for a data warehouse. more info here:

Date Dimension

Hi All, I understood Kimball way of implementation Date Dimension table. In a way, the lowest granularity date represent each record, with the following month, quarter and year attribute. However, what happen if the lowest grain of certain fact are at