SPARQL vs. SQL – Intro

Abi Evans — Thu, 13 Aug 2015 03:26:17 +0000

This lesson compares the SPARQL and SQL query languages, which are designed to query RDF and relational data, respectively. It is designed for those who know one and want to learn the other or who need to make some decisions about which to use for some purpose. In keeping with the culture of re-use and integration that pervades the Semantic Web, SPARQL can be used to access relational data as well as RDF. This lesson also briefly mentions two recent specifications for mapping between the two types of data models.

URL: http://www.cambridgesemantics.com/semantic-university/sparql-vs-sql-intro
Keywords: SPARQL, SQL, R2RML, RDBMS
Publisher: Cambridge Semantics
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M
Educational use: instruction
Interactivity type: expositive

SPARQL Tutorial: Datasets

Abi Evans — Thu, 13 Aug 2015 03:26:17 +0000

This tutorial covers RDF Datasets- the units that are queried by a SPARQL query. An RDF Dataset consists of a default graph, and a number of named graphs. Discusses the use of the GRAPH keyword; querying to find data from graphs that match a pattern (the name of the graphs to be queried can be determined with the query itself); how to describe RDF Datasets using FROM and FROM NAMED.

URL: http://jena.apache.org/tutorials/sparql_datasets.html
Keywords: SPARQL, Named Graph, Default Graph
Publisher: The Apache Software Foundation
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P10M

Uses FROM to formulate queries with URLs and local files. – Linked Data for Professional Education

SPARQL vs. SQL – Intro

SPARQL Tutorial: Datasets