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v4.5
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    v4.5

      LIMIT

      LIMIT conserve les N premières lignes dans l'alias et ignore les autres lignes.

      Syntaxe : LIMIT <number>
      Entrée :

      • <number> : Le nombre de lignes à conserver, ou conserver toutes les lignes lorsque défini à -1

      Par exemple, conserver les deux premières lignes du path:

      find().nodes([1, 5]) as nodes
      n(nodes).e()[:2].n() as path
      limit 2
      return path
      

      Veuillez noter la différence entre la clause LIMIT et le paramètre de commande de chaîne .limit(), il convient de noter que .limit() conserve les deux premières lignes de chaque sous-requête du path, pas les deux premières lignes de l'ensemble du path :

      find().nodes([1, 5]) as nodes
      n(nodes).e()[:2].n().limit(2) as path
      return path
      

      Exemple de graph : (à utiliser pour les exemples suivants)

      Lancez les UQLs ci-dessous un par un dans un graphset vide pour créer des données de graph:

      create().node_schema("student").node_schema("course")
      create().node_property(@*, "name").node_property(@student, "age", int32).node_property(@course, "credit", int32)
      insert().into(@student).nodes([{_id:"S001", _uuid:1, name:"Jason", age:25}, {_id:"S002", _uuid:2, name:"Lina", age:23}, {_id:"S003", _uuid:3, name:"Eric", age:24}, {_id:"S004", _uuid:4, name:"Emma", age:26}, {_id:"S005", _uuid:5, name:"Pepe", age:24}])
      insert().into(@course).nodes([{_id:"C001", _uuid:6, name:"French", credit:4}, {_id:"C002", _uuid:7, name:"Math", credit:5}])
      insert().into(@default).edges([{_uuid:1, _from_uuid:1, _to_uuid:6}, {_uuid:2, _from_uuid:2, _to_uuid:6}, {_uuid:3, _from_uuid:3, _to_uuid:6}, {_uuid:4, _from_uuid:2, _to_uuid:7}, {_uuid:5, _from_uuid:3, _to_uuid:7}, {_uuid:6, _from_uuid:4, _to_uuid:7}, {_uuid:7, _from_uuid:5, _to_uuid:7}])
      

      Utilisation Courante

      Exemple : Trouver 3 nodes de @student qui sont les plus âgés

      find().nodes({@student}) as n
      order by n.age desc
      limit 3
      return n.name
      

      Emma
      Jason
      Pepe
      
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