neo4j在特定属性上使用合并加载CSV

我试图输入两个具有相同结构但属性值不同的CSV。我试图让它只创建属性“name”不匹配的新节点。我认为它所做的是，因为完整的列（我没有使用，它是唯一的）忽略了合并，只是创建了一个新节点。我的代码如下所示：

LOAD CSV FROM 'https://s3.amazonaws.com.../inputSample.csv' AS line
MERGE (e:Executable {system: line[0], location: line[1], name: line[2]})
MERGE (d:Dataset {system: line[3], group: line[4], name: line[5]})
CREATE (d)-[:input]->(e)

LOAD CSV FROM 'https://s3.amazonaws.com/.../sampleOutput.csv' AS line
MERGE (e:Executable {system: line[0], location: line[1], name: line[2]})
MERGE (d:Dataset {system: line[3], group: line[4], name: line[5]})
CREATE (e)-[:output]->(d)

来自输入的采样线：

A   Projects/bmp    bmp loc B   ACCT

来自输出的采样线：

B   Projects/asp    asp loc B   ACCT

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因此，我不希望在二次加载中创建第二个d:Dataset，因为该信息已经存在，这有意义吗？

您正在尝试合并具有3个不同值的节点。所以

(e:Executable {system: system1, location: location1, name: name1})

及

它们是不同的

您应该只指定一个要合并的属性，然后设置其他属性：

LOAD CSV FROM 'https://s3.amazonaws.com.../inputSample.csv' AS line
MERGE (e:Executable {name: line[2]})
ON CREATE SET e.system = line[0], e.location = line[1]
MERGE (d:Dataset {name: line[5]})
ON CREATE SET e.system = line[3], d.location = line[4]
CREATE (d)-[:input]->(e)

LOAD CSV FROM 'https://s3.amazonaws.com/.../sampleOutput.csv' AS line
MERGE (e:Executable {name: line[2]})
ON CREATE SET e.system = line[0], e.location = line[1]
MERGE (d:Dataset {name: line[5]})
ON CREATE SET e.system = line[3], d.location = line[4]
CREATE (d)-[:input]->(e)

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在您的解决方案中，只有这是最后一行应该是CREATE（e）-[：output]->（d），除此之外，谢谢！是的，复制粘贴问题，怪我

LOAD CSV FROM 'https://s3.amazonaws.com.../inputSample.csv' AS line
MERGE (e:Executable {name: line[2]})
ON CREATE SET e.system = line[0], e.location = line[1]
MERGE (d:Dataset {name: line[5]})
ON CREATE SET e.system = line[3], d.location = line[4]
CREATE (d)-[:input]->(e)

LOAD CSV FROM 'https://s3.amazonaws.com/.../sampleOutput.csv' AS line
MERGE (e:Executable {name: line[2]})
ON CREATE SET e.system = line[0], e.location = line[1]
MERGE (d:Dataset {name: line[5]})
ON CREATE SET e.system = line[3], d.location = line[4]
CREATE (d)-[:input]->(e)