I built a browser-only SQL practice tool because installing DBeaver is a productivity tax

Recently, I was tutoring data analysts through Preply when I noticed something weird. Every single student — regardless of whether they were prepping for an Amazon interview, a Snowflake analyst role, or just trying to level up at work — asked me the same two questions in their first session: "Where should I practice SQL?" "Do I need to install a database?" These were not beginners. Many of them were already senior BI analysts making $120-180k. They wrote SQL all day in Snowflake or BigQuery. Th