Question

我是neo4j的新手，我试图从两个csv文件导入数据，但我无法做到。这两个csv文件具有以下结构：

master.csv：

ID    NAME    LASTNAME     COLLEGE

01    aaa     bbb          ABC
02    xxx     yyy          BCE

award.csv：

playerID    award                  year

01          best_player            2010
01          rookie_of_the_year     2011
02          best_player            2012

如何为玩家和奖项创建节点以及如何连接它们？

我尝试使用此代码:(但显然它不起作用）

CREATE CONSTRAINT ON (a:PLAYER) ASSERT a.id IS UNIQUE;

CREATE CONSTRAINT ON (b:AWARD) ASSERT b.award IS UNIQUE;

USING PERIODIC COMMIT 
LOAD CSV WITH HEADERS FROM "File:///master.csv" as line fieldterminator ';'
CREATE (:PLAYER {id:line.playerID, name:line.firstName, lastName:line.lastName});

USING PERIODIC COMMIT 
LOAD CSV WITH HEADERS FROM "File:///award.csv" as line fieldterminator ';'
MATCH (player:Player {id:line.playerID})
MERGE (award:AWARD {award:line.award})
CREATE (player)-[r:won]->(award)
set r += {year:line.year}

如果我还要为大学添加节点，是不是？

CREATE CONSTRAINT ON (c:COLLEGE) ASSERT c.name IS UNIQUE;

USING PERIODIC COMMIT 
LOAD CSV WITH HEADERS FROM "file:///master.csv" as line fieldterminator ';'
WITH line
MATCH (player:PLAYER {id:line.playerID})
MERGE (college:COLLEGE {name:line.college}})
CREATE (player)-[:studied]->(college)

由于

Answer 1

据我所知，主要是在你的陈述中使用正确的CASE /案例/案例。根据您显示的输入，我想出了这个（为我工作）：

CREATE CONSTRAINT ON (a:PLAYER) ASSERT a.id IS UNIQUE;
CREATE CONSTRAINT ON (b:AWARD) ASSERT b.award IS UNIQUE;

USING PERIODIC COMMIT 
LOAD CSV WITH HEADERS FROM "file:///master.csv" as line fieldterminator ';'
CREATE (:PLAYER {id:line.bioID, name:line.firstName, lastName:line.lastName});

USING PERIODIC COMMIT 
LOAD CSV WITH HEADERS FROM "file:///award_players.csv" as line fieldterminator ';'
WITH line
MATCH (player:PLAYER {id:line.playerID})
MERGE (award:AWARD {award:line.award})
CREATE (player)-[r:won]->(award)
SET r += {year:line.year};

希望这有帮助，汤姆

如何从csv文件导入数据

1 个答案: