ClickHouse is a high-performance columnar OLAP database built for real-time analytics at scale. Learn its core concepts, schema design rules, table engines, and example queries in this practical guide.

Apache Kafka is a distributed streaming platform built for scalability, fault tolerance, and high throughput. Learn its core concepts, topics, partitions, consumer groups, serialization formats, and stream processing features in this hands-on guide.

Apache Cassandra is a distributed, leaderless database built for scalability and fault tolerance. Learn its core concepts, schema design rules, data types, and example queries in this practical guide.