RDF2RDB

RDF2RDB – convert RDF data to relational databases

RDF2RDB is a free tool written for Python 2 to convert RDF data from the Semantic Web to relational databases. It supports incremental runs (adding more RDF data to a database later) and entailment of new data.

The tool only holds schema data in memory and should support big amounts of data – although performance may be slow.

Find the current version on GitHub

You can see what RDF2RDB makes out of http://www.w3.org/People/Berners-Lee/card.rdf as MySQL dump here

Here you can see how the same database looks like after the FOAF ontology has been “added” to it.