Slowly Changing Dimensions (SCD), as the name suggests, allows you to maintain changes in the Dimension table in Datawarehouse. Before you read this chapter, make sure that you have a complete understanding of data warehousing concepts, especially SCD. Also, make sure you know the SCD1, SCD2, and SCD3 types. For your reference, we have described each SCD in detail in this chapter. For more details, refer to The Data Warehouse Toolkit, Ralph Kimball, Wiley India Private Limited. Before we move ahead with the implementation of the SCD in Informatica Power Center, let's discuss the different types of SCDs.

Note that we are talking about the general SCDs in our discussion, that is, SCD1, SCD2, and SCD3. Apart from these, there will always be Hybrid SCDs, which you will come across as well. Hybrid SCDs are nothing but a combination of multiple SCDs that serve your complex business requirements.

The various types of SCDs are described...