Cube Processing for Dimension Schema changes

Flat Table vs star schema

We hear a lot of BI implementations using star schema. (with few dims snowflaked sometimes ) Why not choose a flat table with all data put together instead of a star schema? (well , this question may seem strange, but please help me out here) Few

Issue with modelling a hierarchy so the OLAP cube build is efficent

I am faced with a nasty which seems to have no neat solution within dimensional modelling. (This could well be just me being brain dead and dumb). Background: We are a major commercial bakery company. Having re-developed and released the first two

Difference between a Cube and a Star

Hello, I have a very basic question. Can anyone please, explain the difference between a cube and a star schema? I studied about Star schema. When I implement it in Oracle Warehouse Builder 11g, I have to create a cube. Am I doing right? regards,

Schema Roadblock: Dimension vs Fact [Dimensions w/FKs to other Dimensions?]

Hello, I'm new to DM, I've picked up Kimball's DW Toolkit and DW ETL Toolkit - both great books. I'm designing a simple datawarehouse for eduction (K-12) and ran into a modeling question. I'm designing the portion pertaining to [homework]

back room design

I have a question. What is the difference between Relation database Design DW(3nf, like the source system) and create a data mart in star schema from that and Dimensional DW (back room the kitchen) and then start schema for presentation. Thanks

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

Dimensional Model Vs Views as Structure for BOBJ Universe

I have a fairly complex data mart (multiple fact tables: 5 at the moment and several more coming; 4 shared dimensions across the 5 facts, 26 total dimensions and several bridge tables). I used standard best practices for building the Business Objects

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

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

Supplier Dimension to include Customers & Employees

We are in the process of finalising Dimensions /Facts to be used in Datawarehouse. Already finalised separate dimensions (eg Customer,Supplier,Employee) to handle requirements of Sales,Purchace and Human resourses. During designing Accounts Payable Fact

Reasons to use a 3NF design over a Dimensional Model design for an EDW - Discussion

I've been dimensional modelling for well over 10 years, and strongly held the opinon that only a dimensional model would work for an EDW, however i'm now begining to think that there are certain requirements that lead to a 3NF design for an 'Enterprise

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

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