Reading signals

Deep SQL & Production Data Engineering

From your first SELECT to a defensible data platform

A 23-module course that takes you from the fundamentals of SQL to production-grade data platforms.

What you'll be able to do

Write production-quality SQL across Postgres, DuckDB, ClickHouse, BigQuery, Snowflake and Spark.
Read a query plan and prove your optimization with measurements.
Design star schemas, SCD2 dimensions and idempotent pipelines.
Operate dbt + Airflow with tests, contracts and lineage.
Defend a production-ready data platform end to end.

Ready when you are

Open the first lesson and turn the course outline into completed, reviewable work.