Inside QuestDB's Query Engine

TLDR Data's Dan wrote up what makes QuestDB's query engine tick. The database is open-source, built for time-series data, and this piece walks through how it processes queries under the hood.

QuestDB is the kind of tool that shows up when you're building dashboards or monitoring systems and need something that doesn't choke on millions of rows. The query engine is where the real work happens — taking your SQL and turning it into fast results without waiting on disk like older databases do.

Why this matters for us: when the systems that run our apps get faster and cheaper, the folks building tools for la comunidad get more room to innovate.