Neo4J：好友推荐简单示例
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://blog.csdn.net/chengyuqiang/article/details/102658749
说明：该例子来源于《Neo4j 3.x 入门经典》
1、初始化数据
CREATE (leBig:Dude {name: "Lebowski"})
CREATE (dudeA1:Dude {name: "A1"})
CREATE (dudeA2:Dude {name: "A2"})
CREATE (leBig)<-[:FRIEND_OF]-(dudeA1)
CREATE (leBig)<-[:FRIEND_OF]-(dudeA2)
CREATE (dudeB1:Dude {name: "B1"})
CREATE (dudeB2:Dude {name: "B2"})
CREATE (dudeB3:Dude {name: "B3"})
在这里插入图片描述
MATCH (dudeA1:Dude {name: "A1"})
MATCH (dudeA2:Dude {name: "A2"})
MATCH (dudeB1:Dude {name: "B1"})
MATCH (dudeB2:Dude {name: "B2"})
MATCH (dudeB3:Dude {name: "B3"})
CREATE (dudeA1)<-[:FRIEND_OF]-(dudeB1)
CREATE (dudeA1)<-[:FRIEND_OF]-(dudeB2)
CREATE (dudeA1)<-[:FRIEND_OF]-(dudeB3)
CREATE (dudeA2)<-[:FRIEND_OF]-(dudeB1)
CREATE (dudeA2)<-[:FRIEND_OF]-(dudeB2)
CREATE (dudeA2)<-[:FRIEND_OF]-(dudeB3)
CREATE (dudeC1:Dude {name: "C1"})
CREATE (dudeC2:Dude {name: "C2"})
CREATE (dudeC3:Dude {name: "C3"})
CREATE (dudeC4:Dude {name: "C4"})
CREATE (dudeB1)<-[:FRIEND_OF]-(dudeC1)
CREATE (dudeB1)<-[:FRIEND_OF]-(dudeC2)
CREATE (dudeB1)<-[:FRIEND_OF]-(dudeC3)
CREATE (dudeB1)<-[:FRIEND_OF]-(dudeC4)
CREATE (dudeB2)<-[:FRIEND_OF]-(dudeC1)
CREATE (dudeB2)<-[:FRIEND_OF]-(dudeC2)
CREATE (dudeB2)<-[:FRIEND_OF]-(dudeC3)
CREATE (dudeB2)<-[:FRIEND_OF]-(dudeC4)
CREATE (dudeB3)<-[:FRIEND_OF]-(dudeC1)
CREATE (dudeB3)<-[:FRIEND_OF]-(dudeC2)
CREATE (dudeB3)<-[:FRIEND_OF]-(dudeC3)
CREATE (dudeB3)<-[:FRIEND_OF]-(dudeC4)
在这里插入图片描述
MATCH (d:Dude) RETURN d
在这里插入图片描述
2、好友推荐
(1) Lebowski的朋友
MATCH (le:Dude {name:"Lebowski"})<-[:FRIEND_OF]-(some:Dude)
RETURN some
在这里插入图片描述
(2) Lebowski的朋友的朋友
MATCH (le:Dude {name:"Lebowski"})<-[:FRIEND_OF]-(someA:Dude)<-[:FRIEND_OF]-(someB:Dude)
RETURN someB
在这里插入图片描述
(3) Lebowski的朋友的朋友的朋友
MATCH (le:Dude {name:"Lebowski"})<-[:FRIEND_OF*3]-(some:Dude)
RETURN DISTINCT some
在这里插入图片描述
在这里插入图片描述
MATCH (le:Dude {name:"Lebowski"})<-[:FRIEND_OF*3]-(some:Dude) RETURN some
在这里插入图片描述
本文参与 腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。
原始发表：2019/10/21 ，如有侵权请联系 cloudcommunity@tencent.com 删除
评论
登录后参与评论
推荐阅读
目录
腾讯云开发者
