SCD Type 1 — Overwrite, and What You Just Lost

See these SCD types in action — live. Replay a change timeline and watch the dimension transform under Type 0/1/2/3/4/6, then explore the join trap, storage cost, and bitemporal corrections — 100% in your browser. Open the SCD Playground →

Members-only chapter

This chapter goes deeper than the free preview.

The free chapters of Slowly Changing Dimensions teach the core ideas. The full track is where you run the real incident, read the annotated source, and ship the fix. Unlock it to keep going.

Unlock full access →