如何检索多个深度关系的节点Neo4j Database Cypher? [英] How to retrieve nodes for multiple depth relationships Neo4j Database Cypher?

问题描述

假设有一个简单的图形，如下所示，

Assuming that there is a simple graph as follows,

(City {name:gotham})<-[:LOCATED]-(Tower {name:abc})<-[:LOCATED]-(Bank:{name:CityBank})
(City {name:gotham})<-[:LOCATED]-(Cinema {name:MainHall})
(City {name:gotham})<-[:LOCATED]-(Bank {name:ComBank})

我如何在Neo4j数据库中获取名为Gotham的城市中的所有银行(包括CityBank和comBank)?我尝试按照以下模式进行操作，它返回了位于城市哥顿的所有节点(包括电影院)

How can i get all banks located in City named Gotham in Neo4j Database (including CityBank and comBank)? I tried following pattern, it returned all the nodes LOCATED in City named gotham (Including Cinema as well)

MATCH (City{name:'Gotham'})<--(Bank) RETURN Bank

推荐答案

假设您刚刚键入错误的查询，什么不起作用?

Assuming you just mistyped the query, what isn't working?

MATCH (:City{name:'Gotham'})<--(bank:Bank) RETURN bank

应该可以正常工作.

should work fine.

完全错误输入，应该已经读过(孤独的星号表明，任何类型的所有关系，任何长度的路径):

Completely wrong as typed, should have read (the lonely star indicating, all relationships of any type, any length path):

MATCH (:City{name:'Gotham'})<-[*]-(bank:Bank) RETURN bank

更好的是:

MATCH (:City{name:'Gotham'})<-[:LOCATED*1..2]-(bank:Bank) RETURN bank

因此仅遍历LOCATED关系.您可以调整*1..2(匹配长度为1到2的路径)以满足路径长度要求(例如，如果添加了Street或Block节点，则可能要匹配长度为3 *1..3的路径)

So as only to traverse LOCATED relationships. You can adjust the *1..2 (match paths of length 1 to 2) to meet path length requirements (if for example you added a Street or Block node, you might want to match paths up to length 3 *1..3)

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