Want to know more about a slowly changing dimension? What about the different types? Patrick goes through examples and ties in the surrogate key!
Handling Type II Dimension with the MERGE Statement
https://sqldownsouth.blogspot.com/2010/11/handling-type-ii-dimension-with-merge.html
Slowly Changing Dimension
https://en.wikipedia.org/wiki/Slowly_changing_dimension
Star Schema The Complete Reference
https://amzn.to/3QJjw2E