In the latest version of Cypher, I can use this query to get all nodes with relationships:
MATCH (n)-[r]-(m) RETURN n,r,m
However, I'm missing nodes without any relationships.
In trying to query the missing nodes, this attempt gives me the error: Variable 'r' not defined
MATCH (n) WHERE NOT (n)-[r]->() RETURN n
And, this attempt shows zero results:
MATCH (n)-[r]->() WHERE r is null RETURN n
I can see the stragglers with:
MATCH (n) RETURN n
But, then I'm missing the relationships.
How do I phrase my query to find all nodes and all relationships without duplicates?
You can try the OPTIONAL MATCH
:
MATCH (n)
OPTIONAL MATCH (n)-[r]-(m)
RETURN n, r, m
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