Archive: January 2012

Using T-SQL Merge to load Data Warehouse dimensions

In my last blog post I showed the basic concepts of using the T-SQL Merge statement, available in SQL Server 2008 onwards. In this post we’ll take it a step further and show how we can use it for loading data warehouse dimensions, and managing the SCD (slowly changing dimension) process. Before we start, let’s have a quick catch up on what an SCD is… What is a Slowly Changing Dimension (SCD)? If you want a full explanation of…