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Useful information and case studies covering Data Warehousing, Data Modeling, and Business Intelligence

I started my career in IT nearly 10 years ago and have remained influenced and driven by two particular technology initiatives - Business Intelligence and Data Warehousing. Opportunities for partnership, learning, and innovation will continue to present themselves as we strive to meld people, business, and technology. I look forward to these opportunities as I am fulfilled by my membership to a scientific community that is driven by the development and execution of technology solutions that enhance the way we live and conduct business.

Archives: September 2013

Data Warehousing Tip: Using T-SQL vs SSIS for Slowly Changing Dimension (SCD) Types 1 and 2

Here’s an example of using T-SQL to process a Slowly Changing Type 1&2 Dimension . Note:  SSIS has an SCD transform ,however, it does not process large dimensional datasets very quickly.
…eh, I’m putting it too nicely, the SSIS SCD transform is painfully slow!  This T-SQL performs 20X quicker than…

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Data Warehousing Tip: T-SQL Script to Create DEFAULT Constraints by Data Type


There is an ongoing discussion/debate regarding the handling of NULLS in a data warehouse, however, the following article by Michelle Poolet summarizes it beautifully – “consider the data warehouse business requirements” (see http://sqlmag.com/database-administration/null-data-warehouse).


Beyond consideration, there are some data types that should get the DEFAULT treatment (bit, char, nchar,… Read more