在Neo4j cypher中计算和操作

Question

I'm trying one query, like this:

MATCH (g:GNE)-[:like]->(c:CLUSTER)<-[:Belong]-(h:GNE) 
WHERE g.sym = 'ST1' AND count(c) >=4  
RETURN h.sym, count(c) AS score, collect(c.clustInfo), h.chr ORDER BY score DESC 

but the expression 'count(c) >= 4' doesn't work... Any suggestions?

Answer 1

You cannot directly use aggregates in a WHERE clause like that, you need to use WITH to create a new variable for testing in subsequent conditions. You query becomes something like:

MATCH (g:GNE{sym:"ST1"})-[:like]->(c:CLUSTER)<-[:Belong]-(h:GNE) 
WITH h, COUNT(c) AS score, COLLECT(c.clusterInfo) AS info
ORDER BY score DESC
WHERE score >= 4
RETURN h.sym, score, info, h.chr