标签：官网 matrix profile 通过 font mos fish 图片 修改
这篇本章通过 neo4j 官方给出的 movie graph 例子学习 neo4j 基本的创建、查询、修改、删除语句。
1. 获取 Example Graph - Movie Graph 实例
2. 导入官网的图谱创建语句
下面展示了电影 "The Matrix" 的人物信息与关系：
1 // create the profiles of actors 2 CREATE (TheMatrix:Movie {title:‘The Matrix‘, released:1999, tagline:‘Welcome to the Real World‘}) 3 CREATE (Keanu:Person {name:‘Keanu Reeves‘, born:1964}) 4 CREATE (Carrie:Person {name:‘Carrie-Anne Moss‘, born:1967}) 5 CREATE (Laurence:Person {name:‘Laurence Fishburne‘, born:1961}) 6 CREATE (Hugo:Person {name:‘Hugo Weaving‘, born:1960}) 7 CREATE (LillyW:Person {name:‘Lilly Wachowski‘, born:1967}) 8 CREATE (LanaW:Person {name:‘Lana Wachowski‘, born:1965}) 9 CREATE (JoelS:Person {name:‘Joel Silver‘, born:1952}) 10 11 //create the relationships between the roles and actors 12 CREATE 13 (Keanu)-[:ACTED_IN {roles:[‘Neo‘]}]->(TheMatrix), 14 (Carrie)-[:ACTED_IN {roles:[‘Trinity‘]}]->(TheMatrix), 15 (Laurence)-[:ACTED_IN {roles:[‘Morpheus‘]}]->(TheMatrix), 16 (Hugo)-[:ACTED_IN {roles:[‘Agent Smith‘]}]->(TheMatrix), 17 (LillyW)-[:DIRECTED]->(TheMatrix), 18 (LanaW)-[:DIRECTED]->(TheMatrix), 19 (JoelS)-[:PRODUCED]->(TheMatrix) 20 21 CREATE (Emil:Person {name:"Emil Eifrem", born:1978}) 22 CREATE (Emil)-[:ACTED_IN {roles:["Emil"]}]->(TheMatrix)
导入成功!
汤姆·汉克斯参演的电影
1. 按名字查找某个实体
eg1: Find the actor named "Tom Hanks"...
neo4j $ MATCH (tom {name: "Tom Hanks"}) RETURN tom
eg2: Find the movie with title "Cloud Atlas"...
neo4j $ MATCH (cloudAtlas {title: "Cloud Atlas"}) RETURN cloudAtlas
2. 使用 limit 关键字限制查询实体个数
eg: Find 10 people...
neo4j $ MATCH (people:Person) RETURN people.name LIMIT 10
3. 使用 where 条件查询语句
eg: Find movies released in the 1990s...
neo4j $ MATCH (nineties:Movie)
WHERE nineties.released >= 1990 AND nineties.released < 2000
RETURN nineties.title
4. 已知一节点和关系查找另一节点信息
eg1: List all Tom Hanks movies...
neo4j $ MATCH (tom:Person {name: "Tom Hanks"})-[:ACTED_IN]->(tomHanksMovies)
RETURN tom,tomHanksMovies
eg2: Who directed "Cloud Atlas"?
neo4j $ MATCH (directors)-[:DIRECTED]->(cloudAtlas {title: "Cloud Atlas"})
RETURN directors.name
or
neo4j $ MATCH (cloudAtlas {title: "Cloud Atlas"})<-[:DIRECTED]-(directors)
RETURN directors.name
5. 查询某个节点上以同样关系连接的节点信息
eg: Tom Hanks‘ co-actors...
neo4j $ MATCH (tom:Person {name:"Tom Hanks"})-[:ACTED_IN]->(m)<-[:ACTED_IN]-(coActors)
RETURN coActors.name
6. 查询与某结点有关系的所有结点信息
eg: How people are related to "Cloud Atlas"...
neo4j $ MATCH (people:Person)-[relatedTo]-(:Movie {title: "Cloud Atlas"})
RETURN people.name, Type(relatedTo), relatedTo
7. 查找两个节点的最短路径（不论任何关系）
eg: Bacon path, the shortest path of any relationships to Meg Ryan
neo4j $ MATCH p=shortestPath( (bacon:Person {name:"Kevin Bacon"})-[*]-(meg:Person {name:"Meg Ryan"}))
RETURN p
8. 查询两个结点的中介结点信息
eg: Find someone to introduce Tom Hanks to Tom Cruise
neo4j $ MATCH (tom:Person {name:"Tom Hanks"})-[:ACTED_IN]->(m)<-[:ACTED_IN]-(coActors),
(coActors)-[:ACTED_IN]->(m2)<-[:ACTED_IN]-(cruise:Person {name:"Tom Cruise"})
RETURN tom, m, coActors, m2, cruise
9. 删除所有结点及关系
neo4j $ MATCH (n) DETACH DELETE n or
neo4j $ MATCH (n)-[m] DELETE n, m
1. 查询一般格式：(keyword 、variable 、 entitle or relationship)
MATCH (sub:subject)-[pre:predicate]->(obj:object) RETURN sub, pre, obj
2. 如果是单向关系需要注意箭头方向
标签：官网 matrix profile 通过 font mos fish 图片 修改
原文地址：https://www.cnblogs.com/sheepcore/p/12486986.html
