Cypher: Avoid duplicate nodes

Question

Have the below relationship

Bob-[:TWINS]-Alice

I need to return all twins. Below is the cypher being used but returns duplicates

MATCH a-[:TWINS]-b 
RETURN a.name, b.name

I've set this up in Neo4j console here.

How not to return duplicates? I know this can be easily fixed by including the direction of the relationship but here the direction is not relevant. So wondering how to avoid duplicates.

Answer 1

This is the classic way:

MATCH a-[:TWINS]-b
WHERE id(a) < id(b)
RETURN a, b