Neo4j aggregate function

Question

I am trying to use the SUM function and store the result of it as a new property of the relationship. But it is not working. The query I used is :

Answer 1

Try it:

MATCH (a:Employee)-[r:CorporateMessage]->(b)
WHERE a.Eid = 6001 AND b.Eid IN [6002,6003,6004,6005,5001]
WITH r, SUM(r.count) as count
SET r.Internalsum = count

Always put aggregation functions in WITH or RETURN.