ClickHouse is a columnar SQL database designed for fast analytical queries on large datasets, particularly useful for real-time analytics and data aggregation across distributed systems. Developers use it when they need to perform complex analytical queries on billions of rows with sub-second response times, making it ideal for time-series data, logs, and event analytics. It's available as both self-hosted and cloud-native deployments, with support for distributed queries across multiple servers.

6,413 open issues · last updated Jul 21, 2026