Understanding Slowly Changing Dimensions – Gethyn Ellis
Understanding Slowly Changing Dimensions Slowly Changing Dimensions (SCDs) are a cornerstone of data warehousing design. They ensure that the descriptive attributes of business entities—customers, products, employees, locations—are handled correctly when they change over time. Without a clear strategy for tracking changes in dimension data, analytical systems either lose valuable history or become inconsistent, leading to … [Read more…]