Query federation is a way to make use of distributed data sources on the Web, including many SPARQL endpoints as well as relational databases. SWObjects makes use of mapping rules represented as ...

In this tutorial, we will step through installing PostgreSQL, connecting to the database, loading some data, and running a variety of SQL queries.

Want faster SQL queries? Here are nine best practices for writing SQL queries that work like a charm (or at least, like they should).