[英]How do i create relationships for existing nodes by importing csv file in neo4j?
lets say i have created [a],[b],[c],[d] nodes in neo4j. 可以说我在neo4j中创建了[a],[b],[c],[d]节点。 how to create relationships among those nodes by importing csv data. 如何通过导入csv数据在这些节点之间创建关系。
csv data:
id,fromNode,toNode,typeOfRelation
1,a,b,KNOWs
2,b,c,FOLLOWS
3,d,a,KNOWS
....
I would do it like this way if your Nodes are in the Graph already. 如果您的节点已经在图中,我将以这种方式进行操作。
CREATE INDEX ON :Label(name);
LOAD CSV WITH HEADERS FROM "file:///<PathToYourCSV>" as input
MATCH (from:Label {name: input.fromNode}), (to:Label {name: input.toNode})
CREATE (from)-[:RELATION { type: input.typeOfRelation }]->(to);
To query it, you can use 要查询它,您可以使用
MATCH (n:Label {name: 'b'}),
(n)-[rel:RELATION]->(follower)
where rel.type = 'FOLLOWS'
return n, follower
Patrick 帕特里克
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