一、基本语法
1、新建节点
（1）基本语法：
() 代表节点
示例：
CREATE (u:User {uid:970939424 }) // 节点类型为User，属性值为uid=970939424
CREATE (u:Round {rid:7194842697444819113 }) // 节点类型为Round对局，属性值为rid:71948426974448191132、新建关联边
基本语法：
()-\[\]->() 代表关联边【需先建立节点，再建立关联边】
示例：
match (n:User {uid:970939424 }),(m:User{uid:658505284}),(r:RoundId {rid:7194842697444819113 })
CREATE (n)-user_game1:user_game_roundid-> (r)<-user_game:user_game_roundid-(m)
CREATE (u)-user_game:user_game_roundid}->(r)
sed -i 's/"//g' 000000_0
删除边：
MATCH (u:User {uid: 1042526861} )-r : user_game_mpuid ->(i:Mpuid {mp_uid: "501045_936304347_1042526861" } ) delete r
边更新：
MATCH (u:User {uid: 1042526861} )-r : user_game_mpuid ->(i:Mpuid {mp_uid: "501045_342594656_1042526861" } ) SET r={ same_round_cnt: 3 ,win_round_cnt: 3 ,lost_round_cnt: 0 ,coin_change_amt: 403 ,feed_cnt: 0 }
3、创建唯一约束：
基于语法：
()-\[\]->() 代表关联边【需先建约束，再导入节点数据】
示例：
CREATE CONSTRAINT ON (c:User) ASSERT c.uid IS UNIQUE
CREATE CONSTRAINT ON (r:Round) ASSERT r.rid IS UNIQUE
CREATE CONSTRAINT ON (m:Mac) ASSERT m.mac IS UNIQUE
CREATE CONSTRAINT ON (m:IP) ASSERT m.ip IS UNIQUE
CREATE CONSTRAINT ON (c:IDCard) ASSERT c.idcard IS UNIQUE
CREATE CONSTRAINT ON (m:Mpuid) ASSERT m.mp_uid IS UNIQUE
4、创建索引：
基于语法：
CREATE INDEX FOR (m:Movie) ON (m.released)
示例：CREATE INDEX ON :User(uid)
CREATE INDEX ON :Round(rid)
5、查询：
（1）
MATCH (nineties:Movie) WHERE nineties.released >= 1990 AND nineties.released < 2000 RETURN nineties.title
（2）
用户两度关联用户查询，如果节点多 不加limit 不会展示关联
MATCH p = (u:User)-\*2-(u2:User) WHERE u.uid=171751482 RETURN p limit 10
6、使用可变长度模式找到电影和演员最多4"跳"远离凯文培根
MATCH (bacon:Person {name:"Kevin Bacon"})-\*1..4-(hollywood)
RETURN DISTINCT hollywood
7、最短路径查询：
Use the built-in shortestPath() algorithm to find the "Bacon Path" to Meg Ryan.
MATCH p=shortestPath(
(bacon:Person {name:"Kevin Bacon"})-\*-(meg:Person {name:"Meg Ryan"})
)
RETURN p
8、删除点边
MATCH (n) DETACH DELETE n
MATCH (u:User {uid:toInt(line0) } )-r:user_game_mpuid-(i:Mpuid {mp_uid: line1} )
DELETE r
9、查看历史命令：
:history
10、先导入点，再导入边；
11、节点属性更新
:auto USING periodic commit 3000
LOAD CSV FROM "file:///risk_export_20230613/node/attr_usr.csv" AS line fieldterminator ","
MERGE (u:User {uid:toInt(line[0])})
ON MATCH SET u={
uid:toInt(line[0]),
recharge_amt_td:toInt(line[1]),
is_login_mps_anjian_15d:toInt(line[2]),
is_login_mps_emulator1_30d:toInt(line[3])
}二、边属性标签更新
1、属性标签存在则更新，不存在则创建
MATCH (u:User {uid: 2025880357} )-r : user_game_mpuid -(i:Mpuid {mp_uid: "501690_2025469353_2025880357" } ) SET r.lost_cnt1=99000