ETL vs ELT

Summary

Two orderings of extract/transform/load — ETL transforms before loading, ELT loads raw data first and transforms inside the warehouse — a distinction that shapes modern data stack design.

How to Learn This

1Learn the practical trade-offs between ETL and ELT for different team sizes.
2Identify which pattern a tool you've used (e.g. dbt) follows.
3Sketch both patterns for the same dataset to see the difference concretely.

Data Pipelines (Concept)

Batch vs Streaming Data

More topics in SQL & Data Engineering Basics

SQL Basics (SELECT, JOIN, GROUP BY)Working with Databases in Python Data Pipelines (Concept)Batch vs Streaming Data Data Warehouses (Concept)Airflow Basics (Overview)Working with APIs for Data Collection Web Scraping (BeautifulSoup)

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