Join result set

Question

I want mutual count of my friends with friendship status. I have created nodes for each user and created relationship with properties between them. I have found my desired resul

Answer 1

When you query a graph db, you should start with the piece of specific data that you know and work outward on the graph from there. Using START n=node(*) ... is very expensive: You are returning the entire list across the entire graph of users. That is not what you want, though, as you only want those that are connected to the user with UserID=1.

START me=node:node_auto_index(UserID = '1')
MATCH me-[r:FRIENDS]-friend-[r1:FRIENDS]-other
WHERE other.FirstName =~ "(?i)dh.*" AND other.UserID <> 1
    AND r.ApprovalStatus = 1 AND r1.ApprovalStatus = 1
    AND NOT (me-[:FRIENDS]-> other)
RETURN other.UserID, other.FirstName, COUNT(friend) AS MutualCount

This finds all friends of friends (other) who have a FirstName that starts with dh and counts the number of mutual friends they share with me.

I also added the clause AND NOT (me-[:FRIENDS]-> other) to remove the case of other also being a friend of me.