> ## Documentation Index
> Fetch the complete documentation index at: https://new.docs.falkordb.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Cypher Language

> Complete Cypher query language reference for FalkorDB including clauses (MATCH, CREATE, DELETE), functions, procedures, algorithms, and indexing for graph queries.

FalkorDB supports the [OpenCypher](https://www.opencypher.org/) query language with proprietary extensions. Cypher is a declarative graph query language that allows you to express what data to retrieve from a graph using pattern matching, filtering, and projections.

This section provides a complete reference for all supported Cypher clauses, functions, procedures, and indexing capabilities.

> **See also:** [Data Types](/datatypes) — Reference for all node, relationship, scalar, temporal, and collection types used in Cypher queries.

## Comments

FalkorDB Cypher supports two comment styles that can be placed anywhere whitespace is allowed:

| Style       | Syntax               | Description                                                           |
| ----------- | -------------------- | --------------------------------------------------------------------- |
| Single-line | `// comment text`    | Everything from `//` to the end of the line is ignored                |
| Multi-line  | `/* comment text */` | Everything between `/*` and `*/` is ignored (may span multiple lines) |

Multiple consecutive comments are fully supported, as are comments embedded mid-query:

```cypher theme={null}
// Find all people named Alice
MATCH (a:Person {name: 'Alice'})
/* Return their
   friends */
RETURN a
```

## Clauses

A Cypher query consists of one or more clauses.

* [MATCH](/cypher/match)
* [OPTIONAL MATCH](/cypher/optional-match)
* [WHERE](/cypher/where)
* [RETURN](/cypher/return)
* [ORDER BY](/cypher/order-by)
* [SKIP](/cypher/skip)
* [LIMIT](/cypher/limit)
* [CREATE](/cypher/create)
* [MERGE](/cypher/merge)
* [DELETE](/cypher/delete)
* [REMOVE](/cypher/remove)
* [SET](/cypher/set)
* [WITH](/cypher/with)
* [UNION](/cypher/union)
* [UNWIND](/cypher/unwind)
* [FOREACH](/cypher/foreach)
* [CALL \{}](/cypher/call)

## Functions

See the list of available [functions](/cypher/functions).

## Procedures

See the list of available [procedures](/cypher/procedures).

## Algorithms

See the list of available graph [algorithms](/algorithms).

## Indexing

See how to use [indexing](/cypher/indexing).

## Frequently Asked Questions

<AccordionGroup>
  <Accordion title="What version of Cypher does FalkorDB support?">
    FalkorDB implements a subset of the **OpenCypher** specification (version 9) with proprietary extensions for indexing, vector search, and graph algorithms. See the [Cypher coverage](/cypher/cypher-support) page for full details.
  </Accordion>

  <Accordion title="How is FalkorDB Cypher different from Neo4j Cypher?">
    FalkorDB supports the core OpenCypher clauses and functions but adds unique features like built-in **vector indexing**, **full-text search** via RediSearch, and native **graph algorithms** (PageRank, BFS, shortest paths). Some advanced Neo4j-specific features like label expressions are not yet supported.
  </Accordion>

  <Accordion title="Can I use parameterized queries in FalkorDB?">
    Yes. Use the `CYPHER` prefix to set parameters, e.g. `CYPHER name='Alice' MATCH (n {name: $name}) RETURN n`. Each client library also provides its own method for passing parameters safely.
  </Accordion>

  <Accordion title="Does FalkorDB support comments in Cypher queries?">
    Yes. FalkorDB supports single-line comments with `//` and multi-line comments with `/* ... */`. Comments can be placed anywhere whitespace is allowed.
  </Accordion>

  <Accordion title="What indexing options are available in FalkorDB?">
    FalkorDB supports three index types: **Range indexes** for exact-match and comparison filters, **Full-text indexes** for text search with stemming and scoring, and **Vector indexes** for similarity search on embeddings.
  </Accordion>
</AccordionGroup>