安裝啟動
下載下傳對應平台檔案（社群版 neo4j-community-3.5.1）
https://neo4j.com/neo4j-community-3.5.2-unix:
https://neo4j.com/artifact.php?name=neo4j-community-3.5.2-unix.tar.gz解壓 進入目錄
$ ./neo4j start # 啟動
$ ./neo4j stop # 停止 界面：
http://localhost:7474/首次使用：使用者名、密碼預設為 neo4j
兩種方法清空資料庫：
1、Cypher 語句：
match (n) detach delete n 2、删出檔案
1、停掉服務
2、删除 graph.db 目錄
3、重新開機服務 重要概念
1、節點
2、關系
3、屬性
增删改查
1、添加4個節點
create(student:Student{id:1, name: "李雷"});
create(student:Student{id:2, name: "韓梅梅"});
create(teacher:Teacher{id:1, name: "倉老師"});
create(school:School{id: 1, title: "山東藍翔"});
小寫student 可以了解為面向對象的實體
大寫Student 可以了解為面向對象的類
2、添加3個關系
match(s:Student{id:1}),(t:Teacher{id:1}) create (t)-[r:教授]->(s);
match(s:Student{id:2}),(t:Teacher{id:1}) create (t)-[r:教授]->(s);
match(s:School{id:1}),(t:Teacher{id:1}) create (t)-[r:就職于]->(s);
3、更新節點 老師改名字了
match(t:Teacher)
where t.id=1
set t.name="小澤老師" 4、删除節點 李雷被開除了
match(s:Student{id: 1})
detach delete s; 5、删除關系 小澤老師去别的班級上課了
match (t:Teacher)-[r:教授]->(s:Student)
where t.id=1 and s.id=2
delete r 6、索引操作
檢視所有索引
:schema
建立索引
create index on:Student(name)
删除索引
drop index on:Student(name)
建立唯一索引
create constraint on (s:Teacher) assert s.name is unique
删除唯一索引
drop constraint on (s:Teacher) assert s.name is unique 修改關系名稱
MATCH (p:Person)-[r:投資]->(c:Company)
CREATE (p)-[r2:Invest{name:"投資"}]->(c)
// copy properties, if necessary
SET r2 = r
WITH r
DELETE r 事務操作
from py2neo import Graph, Node, Relationship
g = Graph()
tx = g.begin()
a = Node("Person", name="Alice")
tx.create(a)
b = Node("Person", name="Bob")
ab = Relationship(a, "KNOWS", b)
tx.create(ab)
tx.commit() 批量導入
movies2.csv.
movieId:ID;title;year:int;:LABEL
tt0133093;'The Matrix';1999;Movie
tt0234215;'The Matrix Reloaded';2003;Movie|Sequel
tt0242653;'The Matrix Revolutions';2003;Movie|Sequel actors2.csv.
personId:ID;name;:LABEL
keanu;'Keanu Reeves';Actor
laurence;'Laurence Fishburne';Actor
carrieanne;'Carrie-Anne Moss';Actor roles2.csv.
:START_ID;role;:END_ID;:TYPE
keanu;'Neo';tt0133093;ACTED_IN
keanu;'Neo';tt0234215;ACTED_IN
keanu;'Neo';tt0242653;ACTED_IN
laurence;'Morpheus';tt0133093;ACTED_IN
laurence;'Morpheus';tt0234215;ACTED_IN
laurence;'Morpheus';tt0242653;ACTED_IN
carrieanne;'Trinity';tt0133093;ACTED_IN
carrieanne;'Trinity';tt0234215;ACTED_IN
carrieanne;'Trinity';tt0242653;ACTED_IN
The call to neo4j-admin import would look like this: 導入指令
$ bin/neo4j-admin import
--nodes import/movies2.csv
--nodes import/actors2.csv
--relationships import/roles2.csv
--delimiter ";"
--array-delimiter "|"
--quote "'"
配置外網通路
conf\neo4j.conf
#dbms.connector.http.listen_address=:7474
dbms.connector.http.listen_address=0.0.0.0:7474
#dbms.connector.bolt.listen_address=:7687
dbms.connector.bolt.listen_address=0.0.0.0:7687 配置環境變量：
#neo4j
export NEO4J_HOME=<neo4j_path>
export PATH=$PATH:$NEO4J_HOME/bin 參考：