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World's most powerful open data catalog for building a high-performance, geo-distributed and federated metadata lake.

A Zig template for building DuckDB extensions

A list of Presto/Trino resources

P2PDB: A Peer-to-Peer Structured Data Trading System

Federated Query Engine over RDF Sources

Local-first federated analytics query engine using DuckDB.

A web application for piloting your Solid Pod (including data upload and management, data privacy editing and notifications, and SPARQL querying via Comunica).

A Python library for querying multiple databases simultaneously through a unified interface, enabling data virtualization without moving data.

Kvatch CLI is a lightweight command-line tool that lets you connect multiple data sources, define datasets, and run SQL queries across them — all as if they were a single unified database.

Demonstration of Presto Federated Queries using Ahana PrestoDB Sandbox on AWS

Execute SQL statements across multiple databases over DB links.

🌳 Performance Inspector and Plan Explorer for Federated Query Engines.

This example shows how to use the Union operation to combine data into a single federated query.

SPARQL service for OpenPredict, based on rdflib-endpoint