Cypher Query Language

Footnote sources: ChatGPT¹

Cypher is the query language used in Neo4j. It is designed for working with graph databases, providing a simple syntax for querying and manipulating data.

Imagine a social network with the following:

• Nodes:
  • User nodes: Alice, Bob, Charlie
• Relationships:
  • Alice FRIENDS_WITH Bob
  • Bob FRIENDS_WITH Charlie

1
2

MATCH (a:User {name: "Alice"})-[:FRIENDS_WITH]->(b:User)
RETURN b.name;

1. MATCH: Identifies patterns in the graph.
   • (a:User {name: "Alice"}): Matches a node labeled User with the property name: "Alice".
   • -[:FRIENDS_WITH]->: Traverses an outgoing FRIENDS_WITH relationship.
   • (b:User): Matches the connected node labeled User.
2. RETURN: Specifies what to retrieve.
   • b.name: Returns the name property of the connected user.

This query would return:

1

Bob