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Dimension Design Help

Posted By:      Posted Date: May 22, 2011    Points: 0   Category :

Hi All,

Need some help here...I have two dimension tables

1. DimWorkType

2. DimWorkTypeCategory

The DimWorkType is at lowest level and has the WorkTypeCategoryKey as foreign key.

We have a WorkType category defined in the WorkTypeCategoryTable.

There are two kind of busineess usres who have categorized the WorTypeCategory in the different way.

For example for one set of users we have the mapping like this

WorkTypeCode WorkTypeName  WorkTYpeCategoryKey

AMC                consultant            1

B110               Manager              2

The DimWorkTypeCategory is like this

ID  CategoryName 

1      Business

2      Internal

For another set of users the AMC comes under the category "Internal" and B110 comes under the "Business". Please let me know how we can handle this situation?

Do we need the separate dimension for the another set of users or we can manage in one DimWorkTypeCategory dimension?


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Dimension design: Key column of non-key Dimension Attribute

Assume I have a product dimension where key dimension attribute is product code - this is a very large dimension with more than 1 million members, the key column for this attribute is productID (integer). There will be other attributes in this dimension related to key attribute.   My question is about the key columns to be defined for these other attributes. As it is related to key attribute, it has to include ProductID as part of key and hence forming a composite key - e.g. Product inception date - the key column for this has to be ProductID + date as many products can have same date. This design will violate the best practice recommendation from MS to have only numeric key columns for very large dimension attributes. But I can't find a way around this and assume this will be case for all non-key attributes in very large dimension. Is my understanding right? I assume this will be an issue for everyone? Any standard way to get around this? Or best to leave it as such? Thanks in advance.

Dimension Design Question


Hello All,

a quick question on dimension design...
We have a project detail page a asp.net based web page where admins enter the project details
There is a section in this page for Project Team where we can assign users to different role (like Project manager, Partner etc..)
There can me more than one user for the same role.

Right now we have total of 10 roles defined in the system.

Now the design question is while doing the dimension design do we need to create ten different dimensions? like DimPM, DimPart etc...
or there is any other way to do this by just creating one single dimension.

Basically from the cube we should be able to see who are the PM's, PART's etc for a project

I have two approaches right now in my mind...
First Approach
a) Need ten dimensions for ten roles ex DimPM(PMKey, PMUserID, PMUserName). DimPart etc...
b) Create a Factless table with columns (FctLesskey, ProjectKey, PMKey, PRATKEY etc...)
c) Fact table - ProjectKey, FctLessKey, Amount etc...

Second approach -

a) Create a Role dimension (fill all the roles) and will have columns RoleKey, RoleName
b) Assuming there is a User dimension (Userkey, UserName etc...)
c) FactLess table - FactLessKey, UserKey, RoleKey
d) Fact Table - ProjectKey, FactLessKey, Amount etc...

Please let me which

Design question for large fact dimension/many to many dimension


I have a pretty typical orders fact table that is aggregated to 1 line per order.

Each order may have between 0-x errors

I implemented this as a many to many dimension with one field in my intermediate fact table being the error number and the other field being the order id

this requires that i have a fact dimension on the orderid(int32) column.

Right now there are about 10m orders per month, putting my annual count around 120m which doesn't leave a lot of room for growth to stay under the ~150m key member (4GB) size limit for a dimension in SSAS.

I wanted to see if anyone had any thoughts on this. I have found 2 different strategies that might work, including using ROLAP For the order dimension or breaking the order dimension into 3 or 4 separate dimensions discussed here



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Need help for Architecture design


I need help to make decision for making framework for new project.
Project is financing (banking) project. It'll b using .net 3.5 sp1 with sql server 2005.
I want to know what should be best approach for framework? Mean to use LINQ or go with Stored procedure way with 3 tier architecture?
or anything else?

For current financing project the framework is done by one of MVP. He used LINQ to all things.
But we facing problem of w3wp process hang. We cant go for web gardening or farming bcz LINQ objects cnt be serialized to store in Session etc.
Difficult to use Transactions in LINQ. Have to use TransactionScope lead to MSDTC problems etc.

Please give your opinion.

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