Etl

PostgreSQL is a powerful, standards-compliant database — but it has its quirks. One of those is how it handles boolean values, especially when exporting data in text format. 🧠 PostgreSQL Boolean Behavior: It’s Not What You Think Internally, PostgreSQL stores boolean values efficiently using just 1 bit — as you’d expect. But when you convert those values to text, say in a query or an export via COPY, things look… different: ...

If you start working with Airflow a bit more seriously, you’ll quickly notice that it’s usually split into multiple services: airflow-init airflow-scheduler airflow-webserver At first, you may wonder: “Why do we need to split them up like this?” Well — this is actually the standard production architecture. Let’s break it down in simple, practical terms. 1️⃣ airflow-init — Preparation Step Also sometimes called airflow-db-migrate or airflow-bootstrap. This runs only once when you initialize Airflow. ...