executing sparql query on all the result of another sparql query

Question

Suppose I have a list of names returned from a sparql query. And another query that uses a name from this list and returns something else. How can I execute this query on all names in the list returned by the other query? Thank you

Answer 1

You use a subquery. Eg,

select ?country ?capital {
  { select ?country {
      #-- criteria for selecting country
  }

  ?country :hasCapital ?country
}

Note that in trivial cases, you wouldn't need a separate subquery, you could just do:

select ?country ?capital {
  #-- criteria for selecting country
  ?country :hasCapital ?country
}