Solved

new Data warehouse for Retail Sales and snowflakes design

Posted on 2011-09-06
1
478 Views
Last Modified: 2016-02-14
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
Comment
Question by:RamzyNEbeid
1 Comment
 
LVL 28

Accepted Solution

by:
Ryan McCauley earned 500 total points
ID: 36496289
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

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Occasionally there is a need to clean table columns, especially if you have inherited legacy data. There are obviously many ways to accomplish that, including elaborate UPDATE queries with anywhere from one to numerous REPLACE functions (even within…
In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question