6-Cvs文件导入

Cvs文件导入

Northwind Graph是官方提供的一个Demo案例，它是教导我们怎么把数据从关系型数据库导入到图形数据库中，我们可以先将数据导为csv文件，然后再通过命令导入到Neo4j当中。

Load records

LOAD CSV WITH HEADERS FROM "http://data.neo4j.com/northwind/products.csv" AS row
CREATE (n:Product)
SET n = row,
  n.unitPrice = toFloat(row.unitPrice),
  n.unitsInStock = toInt(row.unitsInStock), n.unitsOnOrder = toInt(row.unitsOnOrder),
  n.reorderLevel = toInt(row.reorderLevel), n.discontinued = (row.discontinued <> "0")

LOAD CSV WITH HEADERS FROM "http://data.neo4j.com/northwind/categories.csv" AS row
CREATE (n:Category)
SET n = row

LOAD CSV WITH HEADERS FROM "http://data.neo4j.com/northwind/suppliers.csv" AS row
CREATE (n:Supplier)
SET n = row

Create indexes

CREATE INDEX ON :Product(productID)
CREATE INDEX ON :Category(categoryID)
CREATE INDEX ON :Supplier(supplierID)