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[英]Multiple relationships of the same type but with different properties between the same two nodes
[英]Create multiple relationships of same type with different properties between two nodes from csv
在Neo4jDesktop中的兩個節點之間創建具有不同屬性的相同類型的多個關系時,我遇到了問題。
Nodes dataset:
File Name: 1.csv
File Contents:
Id,Desc
A,Alpha
B,Beta
C,Charlie
D,Doyce
Relationships Dataset:
File Name: 2.csv
File Contents:
SeqNo,Date,Count,Weight,From,To
0,2018-04-01,12,308,A,B
1,2018-04-01,3,475,B,C
2,2018-04-01,23,308,C,D
3,2018-04-01,32,524,D,A
4,2018-04-01,0,308,A,C
5,2018-04-01,23,237,B,D
6,2018-04-01,54,308,B,A
7,2018-04-01,23,237,D,B
8,2018-04-01,18,308,D,C
9,2018-04-01,23,308,C,A
10,2018-04-01,78,475,B,C
11,2018-04-01,67,308,A,B
12,2018-04-01,56,237,D,B
13,2018-04-01,34,308,A,C
14,2018-04-01,27,524,A,D
15,2018-04-01,84,237,D,B
// Create Nodes
USING PERIODIC COMMIT
LOAD CSV WITH HEADERS FROM "file:/1.csv" AS row
CREATE (:Node {Id: row.Id, Desc: row.Desc});
// Create Relationships
USING PERIODIC COMMIT
LOAD CSV WITH HEADERS FROM "file:/2.csv" AS row
MERGE (from:Node {Id: row.From})
MERGE (to:Node {Id: row.To})
MERGE (from)-[rel:RELATED_AS]->(to)
ON CREATE SET rel.SeqNo = toInt(row.SeqNo),
rel.Date = row.flightDate,
rel.Count = toInteger(row.Count),
rel.Weight = toFloat(row.Weight)
該語法有效並且僅創建11個關系,兩個節點之間具有傳入和傳出關系。
它忽略了AB,BC,AC和DB之間的其他關系(2個其他關系)。
如何創建具有所有16個關系的圖?
提前致謝。
梅爾。
您的第二個查詢是合並(from)-[rel:RELATED_AS]->(to)
以便Cypher匹配該模式(如果存在)。 因此,后續的匹配,但是由於ON CREATE
語句,因此永遠不會更新值。
由於您希望每次都創建關系,因此可以將語句替換為以下內容。
USING PERIODIC COMMIT
LOAD CSV WITH HEADERS FROM "file:/2.csv" AS row
MERGE (from:Node {Id: row.From})
MERGE (to:Node {Id: row.To})
CREATE (from)-[rel:RELATED_AS {SeqNo: row.SeqNo, Date: row.flightDate, Count: toInteger(row.Count), Weight: toFloat(row.Weight)}]->(to)
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