Finding co-actors
Co-actors of Robert Blake
Given this query and what you have learned about graph traversal:
MATCH (p:Person {name: 'Robert Blake'})-[:ACTED_IN]->(m:Movie),
(coActors:Person)-[:ACTED_IN]->(m)
RETURN m.title, collect(coActors.name)How many relationships are traversed to return the result?
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✓ 16
Hint
The query finds each movie that Robert Blake acted in. How many ACTED_IN traversals is that?
For each movie, it then finds all actors to acted in that movie. It does not traverse the ACTED_IN relationship from Robert Blake twice.
How many ACTED_IN relationships are traversed?
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Solution
This query traverses a total of 16 ACTED_IN relationships.
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Summary
In this challenge, you determined the number of relationships that are traversed during query.
In the next challenge, you will answer another question about query traversal.