如何从 csv 文件中导入数据

Question

我是 neo4j 的新手，我正在尝试从两个 csv 文件导入数据，但我做不到。 这两个 csv 文件的结构如下：

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

如何为玩家和奖励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，对吗？

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)

谢谢

Answer 1

据我所知，主要是在您的陈述中使用正确的 CASE/case/Case。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};

希望这会有所帮助，汤姆