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ad-freiburg / qlever

Very fast SPARQL Engine, which can handle very large knowledge graphs like the complete Wikidata, offers context-sensitive autocompletion for SPARQL queries, and allows combination with text search. It's faster than engines like Blazegraph or Virtuoso, especially for queries involving large result sets.
Apache License 2.0
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Wrong dates for birth date property #1485

Closed dpriskorn closed 2 months ago

dpriskorn commented 2 months ago

QLever outputs the same date for all results in this query and they are all wrong. https://qlever.cs.uni-freiburg.de/wikidata/f6DCiu

hannahbast commented 2 months ago

@dpriskorn Your query is missing the GROUP BY. QLever's only mistake for his query is that it doesn't reject it as malformed. If you ask the same query on WDQS, you will get an error message.

Also, the labels should be added after the GROUP BY.

Here is the corrected query: https://qlever.cs.uni-freiburg.de/wikidata/tTyH5S