Dimension Design with Multiple Data Sources (ORACLE and SQL Server)...

Conformed Dimension Processing Multiple Data Marts

Rookie question. We have 8 conformed dimensions and we are on our 4th data mart using some of these 8 conformed dimensions. We build the conformed dimensions once every night because the client wants to complete full refresh only. The client has

A dozen systems with many dimension codes

Hi, I have more than a dozen systems to integrate, and each has it's own version of dimension codes. The source systems need to use dummy codes, and multiple codes for one entity. This for operational reasons. So, to conform a dimension I have a

ETL from Oracle to SQL Server 2008 Data Warehouse

Hello, Our data warehouse runs on SQL 2008 servers. One of the transactions systems we have runs on an Oracle database and managed by a separate team. What are the recommended methods to extract source data from an Oracle database and loading to a

Initial stage tables from multiple sources?

I was somewhat confused while reading this: The DWH ETL Toolkit, On page 116, Chapter 4, Cleaning and Conforming, Assumptions, in the first bullet "...customer information from various sources initially can be staged in a table [. . .] whose

multiple hierarchy : single dimension vs multiple

Hi Need to analysis sale revenue by store. We have two separate hierarchy for geographic location 1. Country / County / Council / Store name 2. Country / Region / Area / Store name Need valuable suggestion for how to design dimension for above to

Fact table with multiple date ?

Hi, I am modling a fact table for prisoners inscription in order to track historical changes. An admission is the hole stay comprise of one or many inscriptions usually separated by transferts between institutions. In the transactionnal system, it

Converting Columns into Rows.

I have a requirement where I need to convert rows in columns. The data is quite huge there would be around 200 million records. The sample table contains only data for five months but in actual 12 months of data come in a single row and number of columns

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

Dimension Modeling Design challenge - Help Needed

Guys, Help me out identifying whats wrong with my model. I am able to get to the right data, but size of the fact table is arguably high and not gladly acceptable. Let me show you the picture (tip of the iceberg) Data table in transaction db is

Questionnaire for medical record entries

Good afternoon, I am currently working on a data warehouse in the health care sector and I currently facing this problem: The aim of this warehouse is to have an overview of a cancer therapy. So, I have created the following fact table

Data Mining

I'm requesting that folks pitch in and give me their results from bosses. What I'm hoping to accomplish is first of all a verification of preexisting drop rates already determined for the facebook version. Second I'd like to build a proper gear/unit/fp

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

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: