获取 neo4j 中具有特定标签的节点

Question

I want to get all the nodes that have specific labels. My code:

match (n) where labels(n)=["Person","Actor","Old"] return n

While there are nodes that satisfy this property I do not get any results.

Answer 1

This is why:

Labels(n) returns an array of strings, but not necessarily in a specific order.

You can try this:

WHERE n:Person AND n:Actor AND n:Old

Or

WHERE ALL(l in [“Person”, “Actor”, “Old”] WHERE l IN labels(n) )

Answer 2

List does not match if the items are not in the same order/sequence. So first of all, list out all labels in your database so you can see how the labels are arranged.

match (n) 
return distinct labels(n)

Then you will see which node will have those labels that you look for: ["Person","Actor","Old"].

If you are trying to find nodes where it contains all nodes in that list in any order then this query will work for you.

match (n) 
where all(lbl in ["Person","Actor","Old"] where lbl in labels(n))
return n

if you like using APOC functions, here is the query

match (n)
where apoc.coll.isEqualCollection(["Person","Actor","Old"], labels(n))
return n