• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 498
  • Last Modified:

new Data warehouse for Retail Sales and snowflakes design

Dear all
I will start to create my first data warehouse.
All my work will be with SQL Server 2008 R2, SSIS, SSAS, SSRS

I will start by Retail Sales, I did read the part of retail sales from “The Data Warehouse
Toolkit Second Edition the Complete Guide to Dimensional Modeling” for Ralph Kimball

So far the data warehouse structure is clear for me but there are some points I want to clarify.

What is the advantage and disadvantage of the snowflakes? (Example Product and Sub category and the Category) if I didn’t use the snowflake how will I show this data later in the cube.

thanks,
0
RamzyNEbeid
Asked:
RamzyNEbeid
1 Solution
 
Ryan McCauleyData and Analytics ManagerCommented:
It just changes how your fact data rolls up in SSAS - when you're building your SSAS project, you can define dimension hierarchies, but some of them will be defined for you if you're using a snowflake layout because Visual Studio will see how the data is supposed to roll up based on your dimensions.

Here's a Technet chapter talking about dimension granularity and how to create rollups, which a snowflake layout makes a little easier:

http://technet.microsoft.com/en-us/library/ms166573.aspx
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now