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Support for all PostgreSQL aggregate functions, including non-parallelizable ones like RANK, within continuous aggregate definitions.
Distinct from SQL Aggregate Functions: Distinct from SQL Aggregate Functions: specifically covers the use of any PostgreSQL aggregate function within continuous aggregate definitions, not general SQL aggregation.
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GreptimeDB is a distributed, open-source time-series database built for unified observability. It stores and queries metrics, logs, and traces together in a single columnar engine, supporting both SQL and PromQL for analysis. The database is designed as a Kubernetes-native operator with a decoupled compute and storage architecture, enabling horizontal scaling and multi-region deployment. What distinguishes GreptimeDB is its role as a multi-protocol ingestion gateway, accepting data through OpenTelemetry, Prometheus Remote Write, InfluxDB, Loki, Elasticsearch, Kafka, and MQTT protocols without
Processes streaming data with continuous aggregation flows to produce downsampled results in real time.