How to use conditions within a single construct query in sparql?

@scotty_walker 

Conditions can be used within a single construct query in SPARQL by incorporating FILTER statements.

For example, suppose we want to create a new RDF graph from an existing graph but only include triples where the subject is a person and their age is greater than 18. We can achieve this by using a single construct query with a FILTER statement as follows:

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CONSTRUCT {
  ?person a foaf:Person ;
          foaf:name ?name ;
          foaf:age ?age .
}
WHERE {
  ?person a foaf:Person ;
          foaf:name ?name ;
          foaf:age ?age .
  FILTER (?age > 18)
}

In this query, the WHERE clause specifies the triples we want to include in the new graph, while the FILTER statement restricts the results to only include triples where the age of the person is greater than 18. The CONSTRUCT clause specifies the structure of the new RDF graph to be created.

By using a combination of WHERE, FILTER, and CONSTRUCT clauses within a single query, we can apply conditions to selectively create a new graph from an existing one.