AND for combining conditions

Example How AND Works A row only appears in results if it passes every single condition. If it fails any one check, it is excluded. Example: • User from Canada, active, logged in recently: EXCLUDED (fails country check) • User from US, inactive, logged in recently: EXCLUDED (fails status check) • User from US, active, logged in 2024: EXCLUDED (fails login date check) • User from US, active, logged in recently: INCLUDED (passes all checks) Practical Applications Which query correctly combines two conditions? Putting It All Together

About This Interactive Section

This section is part of the Filtering: Beginner lesson on DataDriven, a free data engineering interview prep platform. Each section includes explanations, worked examples, and hands-on code challenges that execute in real time. SQL queries run against a live PostgreSQL database. Python runs in a sandboxed Docker container. Data modeling problems validate against interactive schema canvases. All content is framed around what data engineering interviewers actually test at companies like Meta, Google, Amazon, Netflix, Stripe, and Databricks.

How DataDriven Lessons Work

DataDriven combines four interview rounds (SQL, Python, Data Modeling, Pipeline Architecture) with adaptive difficulty and spaced repetition. Easy problems get harder as you improve. Weak concepts resurface until you master them. Your readiness score tracks progress across every topic interviewers test. Every lesson section ends with problems you solve by writing and running real code, not by picking multiple-choice answers.