Data Warehouse - Indexes

Dimension Table Indexing Strategy

Please tell me what kind of indexes you are using in your dimension tables in your organization. I am looking for dimension tables indexing strategy for Sybase, Oracle and Db2. If you have any indexing strategy document for Dimension tables for

ETL Load - Dropping Indexes and Constraints

Hi, I am currently working on an ETL solution using BODI and SQL Server 2005. Our data warehouse is very small (no more than 5mb) currently and expected growth over the next year is not going to exceed 15mb. Based on the above volume estimates does

Data Warehouse for survey data

Hi All, Working with a company which uses Salesforce.com heavily. They have a large number of custom fields, and great volatility in them - frequently adding and deleting them when they cease being relevant (They collect survey data for their clients).

Data Marts, Conformed dimensions and Data Warehouse

Hello, Can you please assist me in understanding the following. I am new to data warehouse. I'm using microsoft products to build my enterprise DW/BI 1. Do I build data marts for my enterprise DW/BI or do I iteratively build a data warehouse? I

SOA and Data Warehousing

Hello everyone.... I need your help here. I am working on some DW related roadmaps. I am stuck on role SOA(Service Oriented Architecture) is going to play in Data Warehousing ETL in- particular and BI in-general. Your comments on above mentioned are

Data Warehouse with high data availability

When a data warehouse is being updated by periodical ETL load, there could be significant performance impact on the end users' reports while the underlying tables are touched. The data becomes volatile and the query results could be different between

Request of information: Italian softwarehouse for federated Data Warehouse

Hello, I work for an Italian financial Company that needs to reorganize the current reporting system (mainly based on Business Objects), which is made of many Data Warehouses and Datamarts in Oracle and SAP/BI. I'm interested in a federated solution

Defining technical requirements for a datawarehouse, an existing one at that

I have no experience doing requirements documentation for a data warehouse, and am hoping an experienced practitioner or two can provide some practical lessons from documenting a data warehouse. To add an extra twist, the data warehouse is already in

Sybase Indexes

Is yours a Sybase shop? Please specify what kind of indexing strategy you follow in your sybase databse for bi / dw applications . What kind of indexes do u use in your warehouse / bi applications in Sybase shop? Do you follow any indexing strategy i

Staging Activities

What are the common staging activities that the Kimball method recognizes? Traditionally I have used staging databases to 1) Decouple from the source-to-Data Mart for restartability 2) Consolidate multiple sources and source formats into a single

Bridge tables versus massive junk dimensions

I am designing a star schema to store information on hospital stays. This is my first real star schema and things are off to a good start. My fact table is hospital stays. I have a diagnosis dimension. There are multiple diagnoses per stay. Costs are

Bridge Table and Customer Hierarchy

Does anyone know of a good detailed reference that discusses populating and maintaining customer hierarchy type bridge tables? The only decent resource I've found is the "The Data Warehouse ETL Tool Kit", but it only briefly shows an example on

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: