Can SPARQL modify data like SQL? Or is it read-only?

Question

Despite being a query language, SQL can perform DELETE/UPDATE/INSERT operations.

Similarly, can SPARQL modify data?

If find SPARQL convenient so I would like to use it to modify data, for instance to add a property to all items that satisfy a particular WHERE clause.

Is it possible? If not, are there SPARQL extensions to do that? Is any such extension usable on live Wikidata?

Answer 1

There is SPARQL Update. It doesn't seem to be supported by Wikidata Query Service.