ETL Basics (Extract, Transform, Load)

Summary

The standard pattern for moving data from a source system into an analysis-ready destination — extracting raw data, transforming/cleaning it, then loading it somewhere queryable.

• 1Diagram a simple ETL flow for a dataset you've worked with.
• 2Learn the difference between ETL and the increasingly common ELT (load first, transform after).
• 3Understand where this connects to the data warehouses covered in Phase 13.