🕸️Cypher

NEW

Declarative graph query language for expressing and executing pattern matching and updates on property graphs.

DESCRIPTION

Cypher provides an ASCII-art–like syntax to describe nodes, relationships, and properties. It supports pattern matching with MATCH, data creation with CREATE/MERGE, and projection with RETURN. Aggregation, filtering, and path functions enable expressive analytics. Originally created by Neo4j, Cypher influenced openCypher and GQL standardization efforts. It targets property graphs rather than RDF-based graphs.

ALTERNATIVE DEFINITIONS

Neo4j

Cypher is a declarative graph query language that allows you to store and retrieve data from the graph.

Highlights declarative nature and data retrieval/creation in graphs.

Source

Wikipedia

Cypher is a declarative graph query language created by Neo4j.

Concise origin and language classification.

Source

openCypher

openCypher is an open community project to make Cypher available to everyone.

Emphasizes community-driven availability of the language.

Source

RELATED TERMS

Neo4j Graph Database Property Graph Pattern Matching MATCH Clause CREATE Return OpenCypher

COMPETING TERMS

Gremlin SPARQL

KNOWLEDGE AREAS

Programming Languages Data Storage & Operations Semantic & Knowledge Modeling

TARGET AUDIENCE

Data Engineer Software Developer Data Scientist Data Architect

EXTERNAL SOURCES

• Wikipedia - Cypher (query language)
• Neo4j - Official Cypher language manual
• ISO GQL - Context for graph query language standardization
• Apache TinkerPop - Gremlin graph traversal counterpart

TOP QUESTIONS

What makes Cypher declarative?

You specify what graph pattern to find or create, not how to traverse, leaving optimization to the engine.

Category: Understanding

How does Cypher compare to Gremlin?

Cypher is declarative and pattern-centric, while Gremlin is imperative and traversal-oriented. Choice depends on tooling and query style preference.

Category: Comparison

What is MERGE in Cypher?

MERGE matches an existing pattern or creates it if absent, providing upsert-like semantics.

Category: HowTo

Can Cypher update graph data?

Yes. CREATE, MERGE, SET, and DELETE clauses support inserting and modifying nodes, relationships, and properties.

Category: Capabilities

Is Cypher standardized?

Cypher inspired openCypher and contributed to ISO GQL efforts, but Cypher itself is not an ISO standard.

Category: Standards

Does Cypher work with RDF graphs?

Cypher targets property graphs. RDF graphs typically use SPARQL for querying.

Category: Scope

How to optimize Cypher queries?

Create appropriate indexes, use EXPLAIN/PROFILE, limit expansions, and avoid Cartesian products.

Category: BestPractice

What is a common mistake in Cypher pattern matching?

Accidentally generating Cartesian products by matching unconnected patterns without predicates.

Category: Mistakes

Can I parameterize Cypher queries?

Yes. Use parameters to avoid injection, improve caching, and simplify query reuse.

Category: Security