【Neo4j】Introduction to Cypher

Question 1

Suppose you have a graph that contains nodes representing customers and other business entities for your application. The node label in the database for a customer is Customer. Each Customer node has a property named email that contains the customer’s email address. What Cypher query do you execute to return the email addresses for all customers in the graph?

Select the correct answer.

•  MATCH (n) RETURN n.Customer.email
•  MATCH (c:Customer) RETURN c.email
•  MATCH (Customer) RETURN email
•  MATCH (c) RETURN Customer.email

Question 2

Suppose you have a graph that contains Customer and Product nodes. A Customer node can have a BOUGHT relationship with a Product node. Customer nodes can have other relationships with Product nodes. A Customer node has a property named customerName. A Product node has a property named productName. What Cypher query do you execute to return all of the products (by name) bought by customer 'ABCCO'.

Select the correct answer.

•  MATCH (c:Customer {customerName: 'ABCCO'}) RETURN c.BOUGHT.productName
•  MATCH (p:Product)←[:BOUGHT]-(:Customer 'ABCCO') RETURN p.productName
•  MATCH (p:Product)←[:BOUGHT_BY]-(:Customer 'ABCCO') RETURN p.productName
•  MATCH (p:Product)←[:BOUGHT]-(:Customer {customerName: 'ABCCO'}) RETURN p.productName

Question 3

Thus far, you have learned to use a simple MATCH clause to return values. When must you use a variable in a simple MATCH clause?

Select the correct answer.

•  When you want to query the graph using a node label.
•  When you specify a property value to match the query.
•  When you want to use the node or relationship to return a value.
•  When the query involves 2 types of nodes.