QuestDB
QuestDB is an open-source time-series database designed for high-performance ingestion and querying of time-stamped data. It uses a columnar storage model and SQL with time-series extensions to efficiently handle large volumes of data, such as IoT sensor readings, financial market data, and application metrics. It is optimized for low-latency queries and real-time analytics.
Developers should learn QuestDB when building applications that require fast ingestion and querying of time-series data, such as monitoring systems, financial trading platforms, or IoT analytics. It is particularly useful for scenarios needing sub-second query performance on billions of rows, leveraging its SQL interface for ease of use compared to other time-series databases.