SPARQL is a powerful query language for VIVO. Using SPARQL queries one can find and tabulate data in VIVO, create reports and export data to other software. SPARQL is intended for use by programmers and data managers. It is related to SQL, which is used for management of tabular data stored in relational databases.
Learning SPARQL is an excellent O'Reilly book. The book's web site has examples, video and other resources for those learning SPARQL.
Mike Conlon has a collection of sample queries used in VIVO Camp. You can find them here: http://mconlon17.github.io/sparql
And even more SPARQL queries