Display by ObjectProperty in SPARQL - sparql

Question

I have a problem in displaying the result using SPARQL in protege.
I have two classes Panne and Solution and an ObjectProperty hasSolution .
I want to display the Panne that has A Solution ex: GODEX hasSolution SOLGODEX.
I tried
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX panne:<http://www.semanticweb.org/rahma/ontologies/2020/pannesOnto.owl#>
SELECT ?Panne ?Solution
WHERE {
?Panne panne:hasSolution ?Solution}

Answer 1

Without knowing your specific ontology structure, the following will likely need some adaptations.
Currently your query selects all subjects and objects involved in a tuple using panne:hasSolution.
If you want to filter down to only those of a specific solution, you have to include that in the query:
SELECT ?Panne
WHERE {
?Panne panne:hasSolution ex:SOLGODEX .
}
If you want all pairs of panne:Panne and panne:Solution, add the respective patterns to select only members ot those classes:
SELECT ?Panne ?Solution
WHERE {
?Panne a panne:Panne .
?Solution a panne:Solution .
?Panne panne:hasSolution ?Solution .
}