neo4j

UNWIND 将列表里的值展开

CREATE (N0:Person {name: 'Anders'})
CREATE (N1:Person {name: 'Becky'})
CREATE (N2:Person {name: 'Cesar'})
CREATE (N3:Person {name: 'Dilshad'})
CREATE (N4:Person {name: 'George'})
CREATE (N5:Person {name: 'Filipa'})

CREATE (N0)-[:KNOWS]->(N3)
CREATE (N0)-[:KNOWS]->(N2)
CREATE (N0)-[:KNOWS]->(N1)
CREATE (N1)-[:KNOWS]->(N4)
CREATE (N2)-[:KNOWS]->(N4)
CREATE (N3)-[:KNOWS]->(N5)

MATCH (me)-[:KNOWS*1..2]-(remote_friend)
WHERE me.name = 'Filipa'
RETURN remote_friend.name

请注意，可变长度关系不能与 CREATE 和 MERGE 一起使用