Neo4j

I am trying to populate the neo4j database from Kafka using a connector so the person node will constantly be created. I am trying to create a relationship between Person nodes if the timestamp is the same. MERGE (n:Person{age: event.age, gender:even...

I have the following code <"MERGE (a:Person{id: abc.id}) MERGE (b:Place{id:def.id}) MERGE (c:event{id:abcd.id}) MERGE (a)–[:was_at]->(b) MERGE (a)–[:is]->(c) MERGE (c)–[:took_place_at]->(b)"> I wish to create the node a only if the id does not alread...