Slowly Changing Dimensions Explained (SCD 1 & 2) | WHAT | WHY | WHEN | HOW
In today’s video, we deep dive into one of the most important Data Warehousing and ETL concepts:
🔥 Slowly Changing Dimensions (SCD)
We will understand:
🔹 What is SCD
🔹 Why do we need Slowly Changing Dimensions
🔹 SCD Type 1 Explained
🔹 SCD Type 2 Explained
🔹 History Tracking in Dimension Tables
🔹 Overwrite vs Preserve History
🔹 Real World Examples
🔹 Merge Logic Explained
🔹 SQL Merge Statements
🔹 Hash Key Optimization
🔹 Soft Delete Handling
🔹 Expire & Insert Logic
🔹 Practical ETL/Data Engineering Use Cases
This video is perfect for:
✔ Data Engineering Beginners
✔ Azure Data Engineers
✔ ETL Developers
✔ SQL Developers
✔ Data Warehouse Engineers
✔ Anyone preparing for Data Engineering Interviews
Links-
Github - https://github.com/chirag1254/Tutoria...
Linkedin - / chirag-sachdeva-data-engineer
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